cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-10 of 12 results. Next

A262753 Number of (n+2) X (2+2) 0..1 arrays with each row divisible by 5 and each column divisible by 7, read as a binary number with top and left being the most significant bits.

Original entry on oeis.org

4, 9, 25, 100, 361, 1369, 5476, 21609, 85849, 343396, 1371241, 5480281, 21921124, 87665769, 350625625, 1402502500, 5609860201, 22439141209, 89756564836, 359025060969, 1436097847129, 5744391388516, 22977555967081, 91910204694361
Offset: 1

Views

Author

R. H. Hardin, Sep 30 2015

Keywords

Examples

			Some solutions for n=4:
..0..1..0..1....1..1..1..1....1..0..1..0....1..0..1..0....1..0..1..0
..0..0..0..0....1..1..1..1....1..0..1..0....1..0..1..0....1..0..1..0
..0..0..0..0....1..0..1..0....1..0..1..0....1..1..1..1....0..1..0..1
..1..0..1..0....1..0..1..0....1..0..1..0....1..1..1..1....0..1..0..1
..1..1..1..1....1..0..1..0....1..0..1..0....1..1..1..1....0..1..0..1
..1..1..1..1....1..1..1..1....1..0..1..0....1..0..1..0....1..0..1..0
		

Crossrefs

Column 2 of A262759.

Formula

Empirical: a(n) = 4*a(n-1) + 9*a(n-3) - 36*a(n-4) - 8*a(n-6) + 32*a(n-7).
Empirical g.f.: x*(4 - 7*x - 11*x^2 - 36*x^3 + 24*x^4 + 24*x^5 + 32*x^6) / ((1 - x)*(1 - 2*x)*(1 - 4*x)*(1 + x + x^2)*(1 + 2*x + 4*x^2)). - Colin Barker, Dec 31 2018

A262754 Number of (n+2)X(3+2) 0..1 arrays with each row divisible by 5 and each column divisible by 7, read as a binary number with top and left being the most significant bits.

Original entry on oeis.org

7, 17, 49, 319, 1345, 6193, 39751, 229841, 1339569, 8663743, 55835745, 358608881, 2379031207, 15973282577, 107339155889, 729414305599, 4997779808385, 34344305727921, 237112117127431, 1643074583243345, 11416088795366577
Offset: 1

Views

Author

R. H. Hardin, Sep 30 2015

Keywords

Comments

Column 3 of A262759.

Examples

			Some solutions for n=4
..0..1..1..1..1....0..1..1..1..1....1..1..1..1..0....0..1..0..1..0
..0..1..1..1..1....0..1..1..1..1....0..0..0..0..0....0..1..1..1..1
..0..1..1..1..1....1..1..1..1..0....0..0..0..0..0....0..1..1..1..1
..1..1..0..0..1....1..0..1..0..0....0..0..0..0..0....0..1..1..1..1
..1..1..0..0..1....1..0..1..0..0....1..1..1..1..0....0..1..0..1..0
..1..1..0..0..1....0..0..1..0..1....1..1..1..1..0....0..1..0..1..0
		

Crossrefs

Cf. A262759.

A262755 Number of (n+2)X(4+2) 0..1 arrays with each row divisible by 5 and each column divisible by 7, read as a binary number with top and left being the most significant bits.

Original entry on oeis.org

13, 37, 129, 1645, 8605, 52993, 658381, 5747701, 51979793, 636258829, 7230695309, 80140442481, 979582061773, 12020681709477, 143857668728353, 1766744698318765, 21995191160679549, 270443634865041121
Offset: 1

Views

Author

R. H. Hardin, Sep 30 2015

Keywords

Comments

Column 4 of A262759.

Examples

			Some solutions for n=4
..0..0..0..1..0..1....1..1..0..1..1..1....1..0..1..0..0..0....1..1..0..1..1..1
..0..0..0..0..0..0....1..1..0..0..1..0....1..0..1..0..0..0....0..0..0..1..0..1
..0..0..0..0..0..0....1..1..0..0..1..0....1..0..1..1..0..1....0..0..0..0..0..0
..1..1..0..0..1..0....0..0..0..0..0..0....0..0..0..1..0..1....0..0..0..0..0..0
..1..1..0..1..1..1....0..0..0..1..0..1....0..0..0..1..0..1....1..1..0..0..1..0
..1..1..0..1..1..1....0..0..0..1..0..1....0..0..0..0..0..0....1..1..0..1..1..1
		

Crossrefs

Cf. A262759.

A262760 Number of (3+2)X(n+2) 0..1 arrays with each row divisible by 5 and each column divisible by 7, read as a binary number with top and left being the most significant bits.

Original entry on oeis.org

5, 25, 49, 129, 709, 4953, 16705, 73345, 384485, 2252185, 9821425, 47556225, 241769125, 1278440025, 6106506625, 30240858625, 152043549125, 774590745625, 3814859880625, 19015880330625, 95252710613125, 479215784705625
Offset: 1

Views

Author

R. H. Hardin, Sep 30 2015

Keywords

Comments

Row 3 of A262759.

Examples

			Some solutions for n=4
..0..1..0..1..0..0....0..0..0..0..0..0....0..0..1..0..1..0....0..0..0..0..0..0
..1..1..0..1..1..1....0..0..0..0..0..0....0..0..1..0..1..0....1..1..0..0..1..0
..1..1..0..1..1..1....0..0..1..0..1..0....0..0..1..0..1..0....1..1..0..1..1..1
..1..0..0..0..1..1....0..0..1..0..1..0....0..0..0..0..0..0....1..1..0..1..1..1
..0..0..0..0..0..0....0..0..1..0..1..0....0..0..0..0..0..0....0..0..0..1..0..1
		

Crossrefs

Cf. A262759.

Formula

Empirical: a(n) = 5*a(n-1) +290*a(n-4) -1450*a(n-5) -19200*a(n-8) +96000*a(n-9) +370750*a(n-12) -1853750*a(n-13) -1409375*a(n-16) +7046875*a(n-17)

A262761 Number of (4+2)X(n+2) 0..1 arrays with each row divisible by 5 and each column divisible by 7, read as a binary number with top and left being the most significant bits.

Original entry on oeis.org

10, 100, 319, 1645, 16450, 243220, 1614175, 15350125, 153501250, 1790228500, 15826009375, 157647278125, 1576472781250, 16543231412500, 159357016609375, 1592677865078125, 15926778650781250, 161625340977812500
Offset: 1

Views

Author

R. H. Hardin, Sep 30 2015

Keywords

Comments

Row 4 of A262759.

Examples

			Some solutions for n=4
..1..1..0..1..1..1....1..1..1..1..0..0....0..0..1..1..1..1....1..0..0..0..1..1
..1..1..1..1..0..0....1..0..1..0..0..0....0..0..1..1..1..1....0..0..1..1..1..1
..1..1..0..1..1..1....0..0..0..0..0..0....0..0..0..1..0..1....1..0..0..0..1..1
..1..1..1..1..0..0....0..0..0..0..0..0....0..1..0..1..0..0....0..0..1..1..1..1
..1..1..0..1..1..1....0..1..0..1..0..0....0..1..0..1..0..0....1..0..0..0..1..1
..1..1..1..1..0..0....1..1..1..1..0..0....0..1..1..1..1..0....0..0..1..1..1..1
		

Crossrefs

Cf. A262759.

Formula

Empirical: a(n) = 15*a(n-1) -75*a(n-2) +375*a(n-3) +2200*a(n-4) -51750*a(n-5) +258750*a(n-6) -1293750*a(n-7) +3016875*a(n-8) +19434375*a(n-9) -97171875*a(n-10) +485859375*a(n-11) -1589281250*a(n-12) -453750000*a(n-13) +2268750000*a(n-14) -11343750000*a(n-15) +37812500000*a(n-16)

A262762 Number of (5+2)X(n+2) 0..1 arrays with each row divisible by 5 and each column divisible by 7, read as a binary number with top and left being the most significant bits.

Original entry on oeis.org

19, 361, 1345, 8605, 135595, 3051121, 31840777, 475175089, 7929763795, 150668328169, 2326985790673, 39746065869181, 690182655459499, 12460277987364721, 213488928651534985, 3766549018888748593
Offset: 1

Views

Author

R. H. Hardin, Sep 30 2015

Keywords

Comments

Row 5 of A262759.

Examples

			Some solutions for n=4
..1..1..1..1..0..0....1..1..0..1..1..1....0..0..0..0..0..0....1..0..1..0..0..0
..1..1..1..1..0..0....0..1..0..1..0..0....0..1..1..1..1..0....1..1..0..1..1..1
..0..0..1..1..1..1....1..0..0..0..1..1....1..1..0..1..1..1....1..1..0..1..1..1
..0..0..1..0..1..0....0..1..0..1..0..0....0..0..1..1..1..1....1..1..0..1..1..1
..0..0..1..1..1..1....1..0..0..0..1..1....1..0..0..0..1..1....1..0..1..0..0..0
..1..1..1..1..0..0....0..0..0..0..0..0....0..0..1..0..1..0....1..0..1..0..0..0
..0..0..0..1..0..1....0..1..0..1..0..0....1..1..0..0..1..0....0..0..0..0..0..0
		

Crossrefs

Cf. A262759.

A262752 Number of (n+2) X (n+2) 0..1 arrays with each row divisible by 5 and each column divisible by 7, read as a binary number with top and left being the most significant bits.

Original entry on oeis.org

2, 9, 49, 1645, 135595, 71515801
Offset: 1

Views

Author

R. H. Hardin, Sep 30 2015

Keywords

Comments

Diagonal of A262759.

Examples

			Some solutions for n=4
..0..0..0..1..0..1....1..1..0..1..1..1....0..0..0..1..0..1....0..0..1..1..1..1
..1..1..0..0..1..0....1..1..0..1..1..1....0..1..1..0..0..1....1..0..0..0..1..1
..1..1..0..0..1..0....1..1..0..1..1..1....0..0..0..1..0..1....1..1..0..1..1..1
..1..1..0..0..1..0....1..0..0..0..1..1....0..1..1..0..0..1....1..1..0..0..1..0
..0..0..0..1..0..1....1..0..0..0..1..1....0..0..0..1..0..1....0..1..1..1..1..0
..0..0..0..1..0..1....1..0..0..0..1..1....0..1..1..0..0..1....0..0..1..0..1..0
		

Crossrefs

Cf. A262759.

A262756 Number of (n+2)X(5+2) 0..1 arrays with each row divisible by 5 and each column divisible by 7, read as a binary number with top and left being the most significant bits.

Original entry on oeis.org

26, 107, 709, 16450, 135595, 1635877, 37426418, 595006235, 10954392773, 252014772610, 5417495716875, 121326759600741
Offset: 1

Views

Author

R. H. Hardin, Sep 30 2015

Keywords

Comments

Column 5 of A262759.

Examples

			Some solutions for n=4
..0..0..0..1..1..1..1....1..1..1..1..0..0..0....0..0..0..1..1..1..1
..0..0..1..1..0..0..1....0..0..0..0..1..0..1....1..0..1..1..0..1..0
..0..0..0..1..0..1..0....1..1..0..0..1..0..0....1..0..1..1..1..1..1
..1..0..1..0..0..0..0....0..0..0..0..1..0..1....1..1..1..1..0..0..0
..1..0..0..0..1..1..0....1..1..1..1..0..0..0....0..1..0..1..1..0..1
..1..0..1..0..1..0..1....0..0..1..1..0..0..1....0..1..0..1..0..0..0
		

Crossrefs

Cf. A262759.

A262757 Number of (n+2) X (6+2) 0..1 arrays with each row divisible by 5 and each column divisible by 7, read as a binary number with top and left being the most significant bits.

Original entry on oeis.org

52, 321, 4953, 243220, 3051121, 71515801, 3270912532, 99189450609
Offset: 1

Views

Author

R. H. Hardin, Sep 30 2015

Keywords

Comments

Column 6 of A262759.

Examples

			Some solutions for n=3
..0..0..1..0..1..1..0..1....0..0..0..1..0..1..0..0....0..1..0..0..1..0..1..1
..1..0..1..1..1..0..0..1....1..0..0..1..0..1..1..0....1..1..0..0..1..0..0..0
..1..1..1..1..1..1..1..1....1..1..1..1..1..1..1..1....1..1..1..0..1..0..1..1
..1..1..0..1..0..0..1..0....1..1..1..0..1..0..1..1....1..0..1..0..0..0..0..0
..0..1..0..0..0..1..1..0....0..1..1..0..1..0..0..1....0..0..1..0..0..0..1..1
		

Crossrefs

Cf. A262759.

A262758 Number of (n+2)X(7+2) 0..1 arrays with each row divisible by 5 and each column divisible by 7, read as a binary number with top and left being the most significant bits.

Original entry on oeis.org

103, 865, 16705, 1614175, 31840777, 1252506169
Offset: 1

Views

Author

R. H. Hardin, Sep 30 2015

Keywords

Comments

Column 7 of A262759.

Examples

			Some solutions for n=3
..0..0..1..0..0..0..1..1..0....1..0..1..1..0..1..0..0..0
..0..0..0..0..0..0..1..0..1....1..0..0..0..0..0..1..0..0
..1..1..1..1..0..1..1..1..1....1..1..1..1..1..1..1..1..0
..1..1..0..1..0..1..0..0..1....0..1..0..0..1..0..1..1..0
..1..1..1..1..0..1..0..1..0....0..1..1..1..1..1..0..1..0
		

Crossrefs

Cf. A262759.
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