A233870 Number of (n+1)X(2+1) 0..7 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 21

1176, 5404, 26488, 155104, 909408, 5878272, 36964980, 249710396, 1622032500, 11215026376, 74076824924, 518810087196, 3457277192904, 24385605821656, 163265938186764, 1156012704135280, 7758896886604512, 55050635581902056

Offset

1,1

Comments

Column 2 of A233875

Links

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

R. H. Hardin, Empirical recurrence of order 71

Formula

Empirical recurrence of order 71 (see link above)

Example

Some solutions for n=4
..2..5..2....6..1..7....6..3..1....6..6..3....6..0..6....0..3..7....0..3..6
..1..7..1....7..3..6....0..6..7....7..0..6....7..6..7....7..3..0....0..6..0
..1..4..7....1..6..0....3..6..0....2..2..5....6..0..6....3..0..6....7..6..3
..1..7..1....4..0..3....1..7..6....7..0..6....7..6..3....7..3..0....0..6..0
..0..1..0....4..7..3....6..3..1....3..3..0....3..1..7....3..0..6....3..6..3

Crossrefs

Sequence in context: A027485 A204755 A202199 * A237774 A223340 A270147

Adjacent sequences: A233867 A233868 A233869 * A233871 A233872 A233873

Keyword

nonn

Author

R. H. Hardin, Dec 17 2013

Status

approved