A269764 Number of nX5 0..5 arrays with some element plus some horizontally or vertically adjacent neighbor totalling five exactly once.

3000, 14288400, 37212131520, 81208264293720, 162622227315688800, 309460647800786666280, 569305610361027610254240, 1022424348163788969190179600, 1803405199238211022583496752160

Offset

1,1

Comments

Column 5 of A269767.

Links

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

Formula

Empirical: a(n) = 3568*a(n-1) -3927870*a(n-2) +1385802278*a(n-3) -240944625125*a(n-4) +23846037767836*a(n-5) -1395077253516857*a(n-6) +45768268601241258*a(n-7) -609878398576559366*a(n-8) -7449136036164827200*a(n-9) +316128274099296674375*a(n-10) -1710695534729160437500*a(n-11) -28926476414569301562500*a(n-12) +230953703156468750000000*a(n-13) -424812605952250000000000*a(n-14) for n>15

Example

Some solutions for n=1
..0..2..0..3..2. .0..0..5..5..2. .0..3..4..2..3. .1..4..2..1..3

Crossrefs

Cf. A269767.

Sequence in context: A202097 A229782 A269885 * A156655 A128935 A145304

Adjacent sequences: A269761 A269762 A269763 * A269765 A269766 A269767

Keyword

nonn

Author

R. H. Hardin, Mar 04 2016

Status

approved