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 1-7 of 7 results.

A259420 Number of (n+1)X(n+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0011 or 0111.

Original entry on oeis.org

13, 243, 12953, 1990133, 873754597, 1101527291223, 3975872829274865, 41147590225188806309, 1220087829652769318601383, 103689338398592714772850061461, 25251868912730969096083539641411367
Offset: 1

Views

Author

R. H. Hardin, Jun 26 2015

Keywords

Comments

Diagonal of A259427

Examples

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

Crossrefs

A259421 Number of (n+1) X (2+1) 0..1 arrays with each 2 X 2 subblock having clockwise pattern 0000 0001 0011 or 0111.

Original entry on oeis.org

43, 243, 1366, 7695, 43347, 244228, 1376077, 7753553, 43687910, 246163281, 1387029593, 7815349472, 44036333771, 248126951851, 1398095180302, 7877701886559, 44387669863035, 250106600625676, 1409249728938893
Offset: 1

Views

Author

R. H. Hardin, Jun 26 2015

Keywords

Examples

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

Crossrefs

Column 2 of A259427.

Formula

Empirical: a(n) = 6*a(n-1) + 2*a(n-2) - 22*a(n-3) - 6*a(n-4) + 6*a(n-5) + a(n-6).
Empirical g.f.: x*(43 - 15*x - 178*x^2 - 41*x^3 + 49*x^4 + 8*x^5) / (1 - 6*x - 2*x^2 + 22*x^3 + 6*x^4 - 6*x^5 - x^6). - Colin Barker, Dec 25 2018

A259422 Number of (n+1)X(3+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0011 or 0111.

Original entry on oeis.org

142, 1366, 12953, 123306, 1172659, 11155819, 106118138, 1009466878, 9602626846, 91346008647, 868937609248, 8265855103277, 78629755083895, 747973270226802, 7115169104694298, 67683744437222992, 643848260656503313
Offset: 1

Views

Author

R. H. Hardin, Jun 26 2015

Keywords

Comments

Column 3 of A259427

Examples

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

Crossrefs

Formula

Empirical: a(n) = 6*a(n-1) +41*a(n-2) -44*a(n-3) -278*a(n-4) +51*a(n-5) +426*a(n-6) +36*a(n-7) -131*a(n-8)

A259423 Number of (n+1)X(4+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0011 or 0111.

Original entry on oeis.org

469, 7695, 123306, 1990133, 32060569, 516880938, 8331704179, 134312969201, 2165188798924, 34904319329031, 562681121125617, 9070816244710226, 146227977764091271, 2357299291195098509, 38001348653396589778
Offset: 1

Views

Author

R. H. Hardin, Jun 26 2015

Keywords

Comments

Column 4 of A259427

Examples

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

Crossrefs

Formula

Empirical: a(n) = 18*a(n-1) +34*a(n-2) -1078*a(n-3) -384*a(n-4) +17595*a(n-5) -3702*a(n-6) -104436*a(n-7) +47348*a(n-8) +254812*a(n-9) -155015*a(n-10) -240597*a(n-11) +170095*a(n-12) +72147*a(n-13) -60513*a(n-14) -2266*a(n-15) +6147*a(n-16) -594*a(n-17) -142*a(n-18) +25*a(n-19) -a(n-20)

A259424 Number of (n+1)X(5+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0011 or 0111.

Original entry on oeis.org

1549, 43347, 1172659, 32060569, 873754597, 23840819225, 650266054724, 17738788220867, 483879193637566, 13199512190239893, 360061200620900555, 9821906273427713517, 267926042549856960624, 7308600191006157186258
Offset: 1

Views

Author

R. H. Hardin, Jun 26 2015

Keywords

Comments

Column 5 of A259427

Examples

			Some solutions for n=2
..0..1..0..0..1..1....0..1..1..0..1..1....0..0..0..0..1..0....0..0..1..0..1..0
..0..0..0..0..0..0....0..0..1..1..1..0....0..0..1..0..1..0....1..0..0..0..1..0
..1..1..1..0..0..0....0..0..0..0..1..1....0..0..1..0..1..0....1..0..1..0..0..0
		

Crossrefs

Formula

Empirical: a(n) = 17*a(n-1) +441*a(n-2) -2594*a(n-3) -55555*a(n-4) +94770*a(n-5) +2585643*a(n-6) -1145599*a(n-7) -55087536*a(n-8) +10831019*a(n-9) +631423949*a(n-10) -174158787*a(n-11) -4164795233*a(n-12) +1850730317*a(n-13) +16079853013*a(n-14) -9710486208*a(n-15) -36305345879*a(n-16) +26374670314*a(n-17) +47459843513*a(n-18) -38661167718*a(n-19) -35383831131*a(n-20) +31279885514*a(n-21) +14561656988*a(n-22) -13867836147*a(n-23) -3157779772*a(n-24) +3250604408*a(n-25) +358449417*a(n-26) -383837702*a(n-27) -21174776*a(n-28) +20439633*a(n-29) +365875*a(n-30) -355511*a(n-31) +15624*a(n-32)

A259425 Number of (n+1)X(6+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0011 or 0111.

Original entry on oeis.org

5116, 244228, 11155819, 516880938, 23840819225, 1101527291223, 50866278137234, 2349427850331898, 108508759637883502, 5011650686139055977, 231469252522568886300, 10690739165994474824625, 493766694363268100694125
Offset: 1

Views

Author

R. H. Hardin, Jun 26 2015

Keywords

Comments

Column 6 of A259427

Examples

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

Crossrefs

Formula

Empirical recurrence of order 62 (see link above)

A259426 Number of (n+1) X (7+1) 0..1 arrays with each 2 X 2 subblock having clockwise pattern 0000 0001 0011 or 0111.

Original entry on oeis.org

16897, 1376077, 106118138, 8331704179, 650266054724, 50866278137234, 3975872829274865, 310861903249642571, 24302876708094703188, 1900054647395205833528, 148548577603845580636430
Offset: 1

Views

Author

R. H. Hardin, Jun 26 2015

Keywords

Comments

Column 7 of A259427.

Examples

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

Crossrefs

Cf. A259427.
Showing 1-7 of 7 results.