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A222138 Number of nX2 0..4 arrays with no entry increasing mod 5 by 4 rightwards or downwards, starting with upper left zero 2
4, 52, 676, 8788, 114244, 1485172, 19307236, 250994068, 3262922884, 42417997492, 551433967396, 7168641576148, 93192340489924, 1211500426369012, 15749505542797156, 204743572056363028, 2661666436732719364 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A222144

LINKS

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

FORMULA

Empirical: a(n) = 13*a(n-1)

EXAMPLE

Some solutions for n=3

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

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

..0..0....0..3....4..0....0..0....0..3....0..3....1..3....2..4....4..0....3..0

CROSSREFS

Sequence in context: A198281 A220933 A222321 * A006760 A144340 A247020

Adjacent sequences:  A222135 A222136 A222137 * A222139 A222140 A222141

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 09 2013

STATUS

approved

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Last modified October 6 12:35 EDT 2022. Contains 357264 sequences. (Running on oeis4.)