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 1-8 of 8 results.

A222283 Number of nX1 0..1 arrays with exactly floor(nX1/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order.

Original entry on oeis.org

1, 0, 0, 3, 4, 4, 5, 20, 27, 48, 63, 175, 236, 512, 684, 1719, 2320, 5400, 7271, 17776, 24036, 57420, 77636, 188656, 255591, 617176, 836595, 2033175, 2759184, 6697744, 9094949, 22139780, 30086955, 73262232, 99615081, 242931321, 330503120
Offset: 1

Views

Author

R. H. Hardin Feb 14 2013

Keywords

Comments

Column 1 of A222290

Examples

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

Links

A222284 Number of nX2 0..1 arrays with exactly floor(nX2/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order.

Original entry on oeis.org

0, 0, 4, 11, 8, 44, 144, 352, 692, 2488, 6476, 17095, 43308, 131488, 340000, 939959, 2520616, 7194232, 19142160, 53471296, 145636612, 407743540, 1107902624, 3092203004, 8488056840, 23644607144, 64986279340, 181063135999, 499746197884
Offset: 1

Views

Author

R. H. Hardin Feb 14 2013

Keywords

Comments

Column 2 of A222290

Examples

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

Links

A222285 Number of nX3 0..1 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order.

Original entry on oeis.org

0, 4, 4, 35, 83, 532, 1427, 8540, 23798, 143594, 405187, 2455279, 6993039, 42590466, 121981025, 745909396, 2145554406, 13161790760, 37983541068, 233613349710, 675981684148, 4166412530876, 12082238135283, 74601934076542
Offset: 1

Views

Author

R. H. Hardin Feb 14 2013

Keywords

Comments

Column 3 of A222290

Examples

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

Links

A222286 Number of nX4 0..1 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order.

Original entry on oeis.org

3, 11, 35, 208, 1125, 6619, 40321, 250681, 1569385, 9860229, 62350467, 395971584, 2523482587, 16126203359, 103311906743, 663339238220, 4267302505247, 27498492193747, 177468748791963, 1146905501859999, 7421110682709531
Offset: 1

Views

Author

R. H. Hardin Feb 14 2013

Keywords

Comments

Column 4 of A222290

Examples

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

Links

A222287 Number of nX5 0..1 arrays with exactly floor(nX5/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order.

Original entry on oeis.org

4, 8, 83, 1125, 6582, 89852, 564838, 7879795, 50958999, 723447048, 4750196831, 67994171066, 451003258750, 6495868727212, 43379306929941, 627562261878355, 4211483429644946, 61133435798313074, 411800332378830207
Offset: 1

Views

Author

R. H. Hardin Feb 14 2013

Keywords

Comments

Column 5 of A222290

Examples

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

Links

A222288 Number of nX6 0..1 arrays with exactly floor(nX6/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order.

Original entry on oeis.org

4, 44, 532, 6619, 89852, 1249354, 17801910, 256986006, 3744123550, 55066210090, 815041154350, 12128319606229, 181260757915998, 2718723553039248, 40900893166050078, 616897705864541974, 9325074227006211226
Offset: 1

Views

Author

R. H. Hardin Feb 14 2013

Keywords

Comments

Column 6 of A222290

Examples

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

Links

A222289 Number of nX7 0..1 arrays with exactly floor(nX7/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order.

Original entry on oeis.org

5, 144, 1427, 40321, 564838, 17801910, 262048125, 8550246097, 129184703815, 4294346570524, 66002018148195, 2218403489369930, 34478463977532598, 1167416501197133512, 18284642742630658357, 622321211264493492467
Offset: 1

Views

Author

R. H. Hardin Feb 14 2013

Keywords

Comments

Column 7 of A222290

Examples

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

Links

A222282 Number of n X n 0..1 arrays with exactly floor(n X n/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order.

Original entry on oeis.org

1, 0, 4, 208, 6582, 1249354, 262048125, 288902941734, 350421368609396
Offset: 1

Views

Author

R. H. Hardin Feb 14 2013

Keywords

Comments

Diagonal of A222290

Examples

			Some solutions for n=4
..0..0..0..1....0..0..0..0....0..0..1..1....0..0..0..1....0..0..0..0
..0..0..1..1....0..0..0..0....0..1..1..1....0..0..0..1....0..0..1..0
..0..0..1..1....0..0..1..0....0..0..1..1....0..0..1..1....0..0..0..1
..0..1..1..1....0..1..1..0....0..0..1..1....0..0..1..1....0..0..0..1
Showing 1-8 of 8 results.

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