A269276 -id:A269276 - cp's OEIS frontend

A269280 Number of 5Xn 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three exactly once.

0, 236196, 36673560, 4684312584, 542973139128, 59587625651904, 6310088238337128, 651615466055490216, 66042694681962193944, 6597498728751383594736, 651529527626284234223688

Offset: 1

R. H. Hardin, Feb 21 2016

nonn

Row 5 of A269276.

			Some solutions for n=2
..1..0. .1..1. .0..0. .0..1. .1..1. .0..2. .0..1. .1..1. .0..2. .0..1
..0..3. .0..1. .1..0. .2..0. .1..1. .1..1. .0..0. .0..1. .3..2. .3..2
..1..3. .1..1. .1..3. .2..2. .1..0. .3..2. .0..0. .2..2. .2..3. .1..0
..3..3. .2..0. .2..1. .3..1. .2..0. .3..3. .2..2. .0..2. .1..0. .1..1
..1..0. .0..2. .0..0. .0..2. .2..1. .1..3. .1..0. .3..1. .3..2. .1..3

R. H. Hardin, Table of n, a(n) for n = 1..210

Cf. A269276.

Empirical: a(n) = 262*a(n-1) -25913*a(n-2) +1271424*a(n-3) -36373480*a(n-4) +662028380*a(n-5) -8018113210*a(n-6) +65608158980*a(n-7) -356568260410*a(n-8) +1185405035940*a(n-9) -1609856308508*a(n-10) -4162483461884*a(n-11) +23709461283851*a(n-12) -40474763971218*a(n-13) +272846513475*a(n-14) +106799477038956*a(n-15) -171480164894532*a(n-16) +115612142099328*a(n-17) -29562621871104*a(n-18) for n>23

A269281 Number of 6Xn 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three exactly once.

Original entry on oeis.org

0, 2598156, 938176344, 279339197256, 75556007986536, 19356924219624936, 4786284820998999528, 1154228064358389881112, 273210106596010141952520, 63745055133289730721040968, 14703244384392257014503473256

Offset: 1

R. H. Hardin, Feb 21 2016

nonn

Row 6 of A269276.

			Some solutions for n=2
..0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0
..2..0. .2..1. .0..2. .0..2. .0..1. .2..0. .0..0. .2..2. .2..1. .0..1
..1..3. .0..2. .3..0. .1..1. .0..0. .1..1. .3..2. .0..0. .1..1. .0..2
..2..3. .0..0. .0..1. .0..0. .3..3. .3..1. .3..2. .3..1. .0..1. .2..1
..1..0. .2..0. .0..2. .1..0. .3..1. .1..2. .3..3. .3..1. .1..0. .0..2
..1..2. .0..0. .0..2. .1..0. .0..1. .3..1. .3..2. .3..2. .2..3. .0..1

R. H. Hardin, Table of n, a(n) for n = 1..210
R. H. Hardin, Empirical recurrence of order 40

Cf. A269276.

Empirical recurrence of order 40 (see link above)

A269282 Number of 7Xn 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three exactly once.

Original entry on oeis.org

0, 27634932, 23230366488, 16128206816904, 10181956012212600, 6090616046325570480, 3516906597130333936872, 1980763969657041721006344, 1095070756128723603201412440, 596778595867621855341816843744

Offset: 1

R. H. Hardin, Feb 21 2016

nonn

Row 7 of A269276.

			Some solutions for n=2
..0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0
..0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0
..0..1. .0..3. .0..1. .2..0. .0..2. .0..2. .2..1. .0..1. .2..2. .2..0
..3..3. .1..0. .1..0. .3..2. .3..1. .3..0. .1..1. .3..1. .2..3. .1..0
..0..1. .1..1. .1..0. .0..0. .0..1. .1..1. .1..0. .3..0. .2..3. .3..2
..1..0. .3..1. .2..1. .0..1. .2..0. .1..0. .1..3. .2..2. .3..0. .2..0
..1..3. .1..0. .3..1. .0..0. .0..1. .2..3. .1..3. .3..2. .2..2. .1..3

R. H. Hardin, Table of n, a(n) for n = 1..210

Cf. A269276.

cp's OEIS Frontend

A269280 Number of 5Xn 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three exactly once.

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A269281 Number of 6Xn 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three exactly once.

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A269282 Number of 7Xn 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three exactly once.

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