A186785 Number of (n+1)X4 0..3 arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants

2366, 63504, 696596, 17120960, 281080458, 5705992444, 101397910418, 1975255121820, 36536246624156, 698504377421396, 13068876867153840, 247806236334676870, 4660784800342463574, 88125623567615622304

Offset

1,1

Comments

Column 3 of A186786

Links

R. H. Hardin, Table of n, a(n) for n = 1..40

Example

Some solutions for 3X4
..0..1..3..1....3..3..1..0....0..3..2..3....0..0..1..3....2..0..0..3
..3..2..3..2....3..3..1..1....0..3..1..2....3..0..1..2....2..3..0..0
..3..1..3..3....3..3..1..2....0..3..0..1....1..0..2..3....0..3..2..1

Crossrefs

Sequence in context: A269483 A187238 A247923 * A185607 A068282 A234328

Adjacent sequences: A186782 A186783 A186784 * A186786 A186787 A186788

Keyword

nonn

Author

R. H. Hardin Feb 26 2011

Status

approved