A236017 Number of (n+1)X(7+1) 0..2 arrays colored with the sum of the maximum and minimum values of each 2X2 subblock

278352, 471308, 1059410, 2218212, 5955918, 15065380, 46936958, 106489596, 303207968, 743343900, 2188773486, 5233806436, 15136464648, 36955782900, 107935763678, 260965085900, 753356059708, 1846172999084, 5364518774126

Offset

1,1

Comments

Column 7 of A236018

Links

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

Formula

Empirical: a(n) = 5*a(n-2) +26*a(n-4) -26*a(n-6) -27*a(n-8) -1747*a(n-10) -272*a(n-12) -37717*a(n-14) -62475*a(n-16) +342630*a(n-18) +839939*a(n-20) +4400241*a(n-22) +2441946*a(n-24) -9127258*a(n-26) -22859130*a(n-28) -161997232*a(n-30) -301797384*a(n-32) -438054576*a(n-34) +1413159680*a(n-36) +3841915520*a(n-38) -400228160*a(n-40) -851565568*a(n-42) -1236199808*a(n-44) -2446382592*a(n-46) +1411232256*a(n-48) +27648000*a(n-50) +944087040*a(n-52) +199065600*a(n-54) -1658880000*a(n-56) for n>63

Example

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

Crossrefs

Sequence in context: A162765 A186879 A224252 * A252209 A043601 A043867

Adjacent sequences: A236014 A236015 A236016 * A236018 A236019 A236020

Keyword

nonn

Author

R. H. Hardin, Jan 18 2014

Status

approved