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 1-6 of 6 results.

A279488 Number of n X 2 0..1 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

Original entry on oeis.org

1, 0, 5, 18, 68, 235, 801, 2678, 8777, 28343, 90455, 285812, 895302, 2783602, 8598096, 26404831, 80671908, 245328807, 742945582, 2241375512, 6738536925, 20194613731, 60344058090, 179828931783, 534560389757, 1585341579329, 4691443265544
Offset: 1

Views

Author

R. H. Hardin, Dec 13 2016

Keywords

Comments

Column 2 of A279494.

Examples

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

Crossrefs

Cf. A279494.

Formula

Empirical: a(n) = 7*a(n-1) -15*a(n-2) +11*a(n-3) -8*a(n-4) -9*a(n-5) +34*a(n-6) +17*a(n-7) +30*a(n-8) +41*a(n-9) +a(n-10) -18*a(n-11) -24*a(n-12) -33*a(n-13) -24*a(n-14) -8*a(n-15) -a(n-16).

A279489 Number of nX3 0..1 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

Original entry on oeis.org

0, 5, 38, 254, 1433, 8330, 46095, 250440, 1332366, 6989712, 36235705, 185945098, 945895078, 4775688338, 23953618305, 119447804293, 592560152936, 2925941530150, 14387128139448, 70473511001771, 344006151796898
Offset: 1

Views

Author

R. H. Hardin, Dec 13 2016

Keywords

Comments

Column 3 of A279494.

Examples

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

Crossrefs

Cf. A279494.

Formula

Empirical: a(n) = 15*a(n-1) -87*a(n-2) +272*a(n-3) -624*a(n-4) +1167*a(n-5) -1375*a(n-6) +1464*a(n-7) -789*a(n-8) -1362*a(n-9) +1821*a(n-10) -5907*a(n-11) +6610*a(n-12) -315*a(n-13) +3501*a(n-14) +12667*a(n-15) -11622*a(n-16) -6744*a(n-17) -25975*a(n-18) -15276*a(n-19) +19746*a(n-20) +18848*a(n-21) +81336*a(n-22) +55014*a(n-23) -70070*a(n-24) -112530*a(n-25) -108033*a(n-26) -52409*a(n-27) +49242*a(n-28) +227127*a(n-29) +332239*a(n-30) +11925*a(n-31) -374757*a(n-32) -309097*a(n-33) -114708*a(n-34) -22170*a(n-35) +258011*a(n-36) +537372*a(n-37) +265353*a(n-38) -363395*a(n-39) -575142*a(n-40) -183579*a(n-41) +249255*a(n-42) +295275*a(n-43) +86565*a(n-44) -70251*a(n-45) -81003*a(n-46) -30351*a(n-47) +3177*a(n-48) +9021*a(n-49) +4779*a(n-50) +1403*a(n-51) +246*a(n-52) +24*a(n-53) +a(n-54) for n>55

A279490 Number of nX4 0..1 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

Original entry on oeis.org

3, 18, 254, 2684, 26157, 246237, 2241332, 19885341, 172968364, 1481176019, 12518566165, 104634697841, 866300549164, 7113499311107, 57991161908834, 469750378139503, 3783568376847729, 30319325084628268, 241845032680119474
Offset: 1

Views

Author

R. H. Hardin, Dec 13 2016

Keywords

Comments

Column 4 of A279494.

Examples

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

Crossrefs

Cf. A279494.

A279491 Number of nX5 0..1 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

Original entry on oeis.org

3, 68, 1433, 26157, 425588, 6559816, 98128162, 1427793365, 20331614084, 284582186755, 3927098316740, 53546568580206, 722667680151302, 9667043295761140, 128315967227062823, 1691593872181009527
Offset: 1

Views

Author

R. H. Hardin, Dec 13 2016

Keywords

Comments

Column 5 of A279494.

Examples

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

Crossrefs

Cf. A279494.

A279492 Number of nX6 0..1 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

Original entry on oeis.org

9, 235, 8330, 246237, 6559816, 166229033, 4065077852, 96674459373, 2247110811000, 51300573165630, 1153861570049445, 25629843536958954, 563233840671681515, 12263515258020495816, 264870756665941964112
Offset: 1

Views

Author

R. H. Hardin, Dec 13 2016

Keywords

Comments

Column 6 of A279494.

Examples

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

Crossrefs

Cf. A279494.

A279493 Number of nX7 0..1 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

Original entry on oeis.org

15, 801, 46095, 2241332, 98128162, 4065077852, 162346342126, 6294925767121, 238434528280477, 8863487201716422, 324449796535829989, 11723580027925010371, 418958469982919690628, 14829876008361939503733
Offset: 1

Views

Author

R. H. Hardin, Dec 13 2016

Keywords

Comments

Column 7 of A279494.

Examples

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

Crossrefs

Cf. A279494.
Showing 1-6 of 6 results.