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A250909 Number of (n+1)X(4+1) 0..2 arrays with no 2X2 subblock having its maximum diagonal element less than its minimum antidiagonal element 1
39960, 6621219, 1096982379, 181725094746, 30104106257115, 4986961280614953, 826125782084148708, 136853637633971644347, 22670782687226177355267, 3755577099313037361116844, 622138174177304855831638383 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A250913

LINKS

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

FORMULA

Empirical: a(n) = 202*a(n-1) -6346*a(n-2) +54499*a(n-3) -108047*a(n-4) +2308813*a(n-5) -8304217*a(n-6) -16011215*a(n-7) +3358369*a(n-8) +18927043*a(n-9) -60255820*a(n-10) +18024160*a(n-11) +47390528*a(n-12) -6773760*a(n-13)

EXAMPLE

Some solutions for n=1

..1..1..2..2..0....1..2..2..1..2....2..0..2..2..2....2..1..2..0..0

..1..0..0..0..1....1..2..1..1..2....1..0..1..1..2....2..1..0..0..2

CROSSREFS

Sequence in context: A076670 A251757 A250334 * A252332 A106772 A015328

Adjacent sequences:  A250906 A250907 A250908 * A250910 A250911 A250912

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 28 2014

STATUS

approved

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Last modified January 27 10:50 EST 2021. Contains 340465 sequences. (Running on oeis4.)