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A281602 Number of nX5 0..2 arrays with no element equal to more than one of its horizontal, diagonal or antidiagonal neighbors and with new values introduced in order 0 sequentially upwards. 1
30, 442, 8180, 167545, 3401430, 69506779, 1421127262, 29066686772, 594539026170, 12161158312943, 248754881654232, 5088256100638530, 104079805217582244, 2128942973242332029, 43547336604707609360, 890756851949851865902 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A281605.

LINKS

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

FORMULA

Empirical: a(n) = 24*a(n-1) -47*a(n-2) -552*a(n-3) +408*a(n-4) +3664*a(n-5) +11951*a(n-6) +4496*a(n-7) -51712*a(n-8) -608027*a(n-9) +618602*a(n-10) +3874985*a(n-11) -3781199*a(n-12) -16785095*a(n-13) +11073712*a(n-14) +71617473*a(n-15) -132533827*a(n-16) +121433498*a(n-17) -95249752*a(n-18) +148536078*a(n-19) -176780273*a(n-20) -59040921*a(n-21) +269285969*a(n-22) -308246859*a(n-23) +159030948*a(n-24) -64978465*a(n-25) +40730650*a(n-26) +67888637*a(n-27) -98865108*a(n-28) +15454808*a(n-29) +69306797*a(n-30) -40262490*a(n-31) -40951058*a(n-32) +48761392*a(n-33) -12747670*a(n-34) -7345822*a(n-35) +6634632*a(n-36) -1752064*a(n-37) +175688*a(n-38) -11428*a(n-39) -792*a(n-40) for n>42

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A281605.

Sequence in context: A215193 A163130 A280856 * A307917 A006421 A035710

Adjacent sequences:  A281599 A281600 A281601 * A281603 A281604 A281605

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 25 2017

STATUS

approved

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Last modified December 6 22:42 EST 2021. Contains 349567 sequences. (Running on oeis4.)