

A232572


Number of (n+1)X(1+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally, vertically or antidiagonally


1



16, 72, 516, 3048, 18944, 115892, 713488, 4389504, 26985196, 165981072, 1020610296, 6276755004, 38599285272, 237374373944, 1459772807380, 8977123838008, 55206398795888, 339501216593668, 2087821797237664
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OFFSET

1,1


COMMENTS

Column 1 of A232579


LINKS

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


FORMULA

Empirical: a(n) = 2*a(n1) +19*a(n2) +26*a(n3) +52*a(n4) +218*a(n5) +11*a(n6) 258*a(n7) +15*a(n8) +108*a(n9) 64*a(n10) +16*a(n11)


EXAMPLE

Some solutions for n=6
..2..0....1..0....2..1....0..0....0..1....2..0....2..0....1..0....2..1....0..1
..1..0....2..1....0..0....1..2....1..2....1..1....1..0....2..1....0..0....2..2
..0..0....0..0....0..2....1..2....0..0....2..0....0..2....2..0....2..1....0..1
..1..2....1..2....1..2....0..1....1..0....0..1....1..2....2..0....2..2....1..2
..2..0....1..2....2..0....1..0....2..2....2..1....2..1....1..2....2..0....1..2
..1..0....0..1....1..2....2..2....1..2....0..1....0..1....0..1....1..2....0..1
..1..2....1..2....0..1....1..0....0..1....1..2....2..0....0..0....1..0....2..2


CROSSREFS

Sequence in context: A029872 A056633 A248464 * A098096 A298218 A299347
Adjacent sequences: A232569 A232570 A232571 * A232573 A232574 A232575


KEYWORD

nonn


AUTHOR

R. H. Hardin, Nov 26 2013


STATUS

approved



