A236996 Number of (n+1)X(7+1) 0..2 arrays with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one

640000, 30233088, 1406076928, 80675315712, 4279521280000, 219711187058688, 11244238474313728, 700611776439386112, 40435085627883520000, 2290196951375479308288, 131119070760867387670528

Offset

1,1

Comments

Column 7 of A236997

Links

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

Formula

Empirical: a(n) = 140*a(n-1) -6176*a(n-2) +87040*a(n-3) +21476352*a(n-4) -3006689280*a(n-5) +132637949952*a(n-6) -1869301678080*a(n-7) -149335861886976*a(n-8) +20907020664176640*a(n-9) -922298283013963776*a(n-10) +12998193418642391040*a(n-11) +331760110214840320000*a(n-12) -46446415430077644800000*a(n-13) +2048950440686853816320000*a(n-14) -28876399993099701452800000*a(n-15)

Example

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

Crossrefs

Sequence in context: A257194 A257187 A254987 * A250884 A190574 A210010

Adjacent sequences: A236993 A236994 A236995 * A236997 A236998 A236999

Keyword

nonn

Author

R. H. Hardin, Feb 02 2014

Status

approved