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A251518 Number of (n+1)X(2+1) 0..3 arrays with every 2X2 subblock summing to 2 3 4 5 6 7 8 9 or 10 1
3798, 227174, 13580282, 811863390, 48535019898, 2901533826974, 173460282721706, 10369849728580798, 619933172482703578, 37061013265529804958, 2215591559271926856906, 132453096259066371311422 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A251524

LINKS

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

FORMULA

Empirical: a(n) = 59*a(n-1) +67*a(n-2) -1223*a(n-3) +782*a(n-4) +1020*a(n-5) -520*a(n-6)

EXAMPLE

Some solutions for n=1

..1..1..3....2..2..1....0..0..2....3..3..2....1..3..0....0..3..2....1..3..3

..3..0..2....3..2..1....0..3..3....2..1..2....2..3..1....1..0..2....2..0..0

CROSSREFS

Sequence in context: A109183 A284872 A253280 * A031793 A234765 A228545

Adjacent sequences:  A251515 A251516 A251517 * A251519 A251520 A251521

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 03 2014

STATUS

approved

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Last modified December 6 09:43 EST 2021. Contains 349563 sequences. (Running on oeis4.)