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

A203485 Number of n X 2 0..2 arrays with row sums equal and column sums unequal to adjacent columns.

Original entry on oeis.org

6, 10, 36, 82, 256, 676, 2050, 5826, 17568, 51640, 155590, 463996, 1397766, 4192646, 12626836, 37955426, 114267376, 343694728, 1034313190, 3111132672, 9359196778, 28146901826, 84646727920, 254509346220, 765178882006, 2300166018706
Offset: 1

Views

Author

R. H. Hardin, Jan 02 2012

Keywords

Comments

Column 2 of A203491.

Examples

			Some solutions for n=5
..2..0....2..0....1..0....2..0....0..2....0..2....1..0....2..0....2..0....0..1
..1..1....0..2....0..1....2..0....2..0....1..1....0..1....1..1....1..1....0..1
..0..2....0..2....0..1....2..0....0..2....0..2....1..0....1..1....0..2....1..0
..2..0....0..2....0..1....2..0....0..2....0..2....0..1....0..2....2..0....0..1
..1..1....2..0....0..1....0..2....1..1....0..2....1..0....2..0....2..0....0..1

Links

Crossrefs

Cf. A203491.

A203486 Number of nX3 0..2 arrays with row sums equal and column sums unequal to adjacent columns.

Original entry on oeis.org

12, 80, 624, 3760, 25002, 171068, 1107888, 7411872, 50469114, 335270710, 2266967088, 15497479060, 104719636176, 715192200880, 4919017621164, 33647413101184, 231673960276602, 1602349695229334, 11054192845643568
Offset: 1

Views

Author

R. H. Hardin Jan 02 2012

Keywords

Comments

Column 3 of A203491

Examples

			Some solutions for n=5
..0..0..1....1..2..2....1..1..0....2..1..0....2..1..2....1..1..0....1..0..2
..0..1..0....2..1..2....1..1..0....2..1..0....1..2..2....0..1..1....2..1..0
..0..1..0....2..2..1....1..1..0....2..1..0....1..2..2....2..0..0....2..0..1
..0..1..0....2..1..2....0..0..2....0..1..2....1..2..2....0..2..0....2..0..1
..1..0..0....2..1..2....2..0..0....0..1..2....1..2..2....2..0..0....2..1..0

Links

A203487 Number of nX4 0..2 arrays with row sums equal and column sums unequal to adjacent columns.

Original entry on oeis.org

24, 556, 9540, 173860, 3065704, 56438584, 1004305424, 18465834580, 335571341040, 6219202151476, 114039550489064, 2121345108007408, 39325546973748384, 735898709559550484, 13729000925046178840, 257888578347427756340
Offset: 1

Views

Author

R. H. Hardin Jan 02 2012

Keywords

Comments

Column 4 of A203491

Examples

			Some solutions for n=5
..0..0..1..2....1..1..2..2....1..1..1..1....2..2..2..0....2..1..1..0
..2..0..0..1....2..1..2..1....1..0..1..2....0..2..2..2....2..2..0..0
..2..0..0..1....2..1..2..1....2..1..0..1....0..2..2..2....0..1..2..1
..1..0..0..2....1..1..2..2....1..0..2..1....0..2..2..2....0..1..2..1
..2..0..0..1....1..1..2..2....1..0..1..2....1..1..2..2....2..0..2..0

Links

A203492 Number of 2Xn 0..2 arrays with row sums equal and column sums unequal to adjacent columns.

Original entry on oeis.org

3, 10, 80, 556, 3348, 20596, 134412, 888232, 5836068, 38457456, 255381636, 1704162724, 11399565860, 76433483528, 513785171540, 3461284463632, 23360156262164, 157908381404144, 1068981156413892, 7246198178206132
Offset: 1

Views

Author

R. H. Hardin Jan 02 2012

Keywords

Comments

Row 2 of A203491

Examples

			Some solutions for n=5
..0..2..0..2..2....1..0..1..2..0....2..1..0..2..1....1..1..1..2..1
..0..1..2..2..1....2..0..2..0..0....2..2..1..1..0....1..2..1..1..1

Links

A203493 Number of 3Xn 0..2 arrays with row sums equal and column sums unequal to adjacent columns.

Original entry on oeis.org

3, 36, 624, 9540, 170868, 3171708, 59683122, 1152091884, 22554305502, 446374660920, 8921216076156, 179685599410440, 3642895093030506, 74273800555695024, 1521731710882139544, 31310362607335978500
Offset: 1

Views

Author

R. H. Hardin Jan 02 2012

Keywords

Comments

Row 3 of A203491

Examples

			Some solutions for n=5
..2..1..2..1..1....0..2..2..2..0....2..2..1..0..0....2..0..1..2..1
..1..1..2..1..2....1..2..0..1..2....0..0..1..2..2....2..1..2..1..0
..2..1..1..1..2....2..1..0..2..1....0..1..2..0..2....2..1..1..2..0

Links

A203488 Number of n X 5 0..2 arrays with row sums equal and column sums unequal to adjacent columns.

Original entry on oeis.org

48, 3348, 170868, 8518564, 421158558, 20726134056, 1022868051652, 50561285393908, 2503295874466950, 124208845614214498, 6167894219771885242, 306989800251437858776, 15307714522320704176494, 764702726505274412235480
Offset: 1

Views

Author

R. H. Hardin, Jan 02 2012

Keywords

Comments

Column 5 of A203491.

Examples

			Some solutions for n=5
..0..0..2..0..0....1..0..2..2..0....2..0..2..2..0....1..0..0..0..0
..0..0..1..1..0....2..2..1..0..0....1..0..1..2..2....1..0..0..0..0
..0..1..0..0..1....2..1..2..0..0....0..2..0..2..2....1..0..0..0..0
..0..1..0..1..0....1..0..1..1..2....1..1..0..2..2....0..0..0..0..1
..1..0..1..0..0....1..2..2..0..0....0..2..0..2..2....0..0..1..0..0

Crossrefs

Cf. A203491.

A203489 Number of nX6 0..2 arrays with row sums equal and column sums unequal to adjacent columns.

Original entry on oeis.org

96, 20596, 3171708, 442135180, 61706303456, 8496020082856, 1172134178554204, 161068791865426940
Offset: 1

Views

Author

R. H. Hardin Jan 02 2012

Keywords

Comments

Column 6 of A203491

Examples

			Some solutions for n=5
..2..2..2..0..1..2....2..2..0..2..2..2....1..0..0..0..1..2....1..1..1..1..1..0
..0..1..2..2..2..2....2..1..1..2..2..2....1..0..2..1..0..0....1..2..1..0..0..1
..0..2..1..2..2..2....2..1..1..2..2..2....2..1..0..0..0..1....1..0..2..0..1..1
..1..2..0..2..2..2....0..2..2..2..2..2....2..1..0..1..0..0....0..1..0..0..2..2
..1..2..2..2..0..2....1..2..2..2..1..2....1..0..1..2..0..0....1..2..0..0..2..0

A203490 Number of nX7 0..2 arrays with row sums equal and column sums unequal to adjacent columns.

Original entry on oeis.org

192, 134412, 59683122, 24148894412, 9532999874792
Offset: 1

Views

Author

R. H. Hardin Jan 02 2012

Keywords

Comments

Column 7 of A203491

Examples

			Some solutions for n=4
..0..1..0..0..2..1..0....0..2..1..2..0..0..0....0..1..1..1..2..2..0
..0..2..0..2..0..0..0....2..2..0..0..0..1..0....0..0..2..0..1..2..2
..2..2..0..0..0..0..0....1..1..2..1..0..0..0....1..2..2..2..0..0..0
..2..0..1..0..1..0..0....0..0..0..2..0..2..1....0..2..1..1..0..1..2

A203494 Number of 4Xn 0..2 arrays with row sums equal and column sums unequal to adjacent columns.

Original entry on oeis.org

3, 82, 3760, 173860, 8518564, 442135180, 24148894412
Offset: 1

Views

Author

R. H. Hardin Jan 02 2012

Keywords

Comments

Row 4 of A203491

Examples

			Some solutions for n=5
..2..1..0..0..2....1..2..2..0..0....0..1..2..1..2....1..2..1..1..0
..0..0..2..1..2....1..1..2..0..1....1..2..1..0..2....1..2..0..1..1
..1..1..1..1..1....2..1..2..0..0....1..1..1..2..1....2..0..2..0..1
..0..2..2..0..1....0..2..2..0..1....1..2..1..1..1....2..0..2..1..0

A203495 Number of 5Xn 0..2 arrays with row sums equal and column sums unequal to adjacent columns.

Original entry on oeis.org

3, 256, 25002, 3065704, 421158558, 61706303456, 9532999874792
Offset: 1

Views

Author

R. H. Hardin Jan 02 2012

Keywords

Comments

Row 5 of A203491

Examples

			Some solutions for n=5
..1..1..2..0..1....1..0..0..0..0....0..2..2..2..1....1..2..2..1..0
..2..1..2..0..0....1..0..0..0..0....0..1..2..2..2....0..1..1..2..2
..0..2..2..0..1....1..0..0..0..0....2..2..2..0..1....1..2..2..0..1
..1..0..1..1..2....0..0..0..0..1....0..1..2..2..2....1..1..1..1..2
..2..0..1..2..0....0..0..1..0..0....0..2..2..1..2....0..1..2..1..2
Showing 1-10 of 12 results. Next

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