A235907 Number of (n+1)X(4+1) 0..2 arrays with the minimum plus the maximum unequal to the lower median plus the upper median in every 2X2 subblock

7632, 267548, 9533120, 345346064, 12495925760, 454589648064, 16501573788672, 600431925362944, 21815700608966656, 793604369179700224, 28844899001196888064, 1049108569592280551424, 38138454905136923672576

Offset

1,1

Comments

Column 4 of A235911

Links

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

Formula

Empirical: a(n) = 36*a(n-1) +1232*a(n-2) -49072*a(n-3) -320464*a(n-4) +21147264*a(n-5) -41996672*a(n-6) -3277026816*a(n-7) +16049849344*a(n-8) +185646088192*a(n-9) -1087945580544*a(n-10) -2355224936448*a(n-11) +10841935314944*a(n-12) +7255032332288*a(n-13) -30793405562880*a(n-14) -6500433002496*a(n-15) +26613764849664*a(n-16)

Example

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

Crossrefs

Sequence in context: A253041 A068245 A189551 * A252968 A252051 A038011

Adjacent sequences: A235904 A235905 A235906 * A235908 A235909 A235910

Keyword

nonn

Author

R. H. Hardin, Jan 16 2014

Status

approved