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A256767 Number of (n+2)X(4+2) 0..1 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum 1
43264, 456976, 2768896, 16777216, 80281600, 384160000, 1648360000, 7072810000, 28879603600, 117920812816, 471683251264, 1886733005056, 7495505035264, 29777713954816, 118194817601536, 469143297200656, 1864496164355344 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A256771

LINKS

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

FORMULA

Empirical: a(n) = 6*a(n-1) +56*a(n-2) -386*a(n-3) -1374*a(n-4) +11494*a(n-5) +18802*a(n-6) -210762*a(n-7) -141548*a(n-8) +2670938*a(n-9) +235458*a(n-10) -24884998*a(n-11) +7670370*a(n-12) +177000930*a(n-13) -106464642*a(n-14) -984901998*a(n-15) +822152493*a(n-16) +4357061592*a(n-17) -4503395874*a(n-18) -15481789056*a(n-19) +18820242924*a(n-20) +44428227456*a(n-21) -62009493480*a(n-22) -103078057920*a(n-23) +163857085584*a(n-24) +192597981696*a(n-25) -350346002016*a(n-26) -286734165504*a(n-27) +608226643008*a(n-28) +332631639552*a(n-29) -856680920448*a(n-30) -286505805312*a(n-31) +974170560000*a(n-32) +160252569600*a(n-33) -885968068608*a(n-34) -23146954752*a(n-35) +634697777152*a(n-36) -55991795712*a(n-37) -349866131456*a(n-38) +64331841536*a(n-39) +143058665472*a(n-40) -37874040832*a(n-41) -40832598016*a(n-42) +13627293696*a(n-43) +7256145920*a(n-44) -2852126720*a(n-45) -603979776*a(n-46) +268435456*a(n-47)

EXAMPLE

Some solutions for n=1

..1..1..0..0..0..1....0..1..1..1..0..0....0..0..1..1..0..0....1..1..0..0..0..0

..0..0..0..1..1..1....1..1..0..0..0..0....0..0..0..0..1..0....1..0..1..0..0..0

..1..0..0..0..0..1....0..0..1..1..1..0....0..0..1..1..1..1....1..0..0..0..1..0

CROSSREFS

Cf. A256771

Sequence in context: A205053 A146074 A321038 * A258677 A184382 A126771

Adjacent sequences:  A256764 A256765 A256766 * A256768 A256769 A256770

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 09 2015

STATUS

approved

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Last modified November 29 02:12 EST 2020. Contains 338756 sequences. (Running on oeis4.)