A207808 T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 0 and 1 0 1 vertically

2, 4, 4, 6, 16, 6, 10, 36, 36, 10, 16, 100, 102, 100, 16, 26, 256, 378, 370, 256, 26, 42, 676, 1260, 1970, 1232, 676, 42, 68, 1764, 4374, 9040, 9168, 4238, 1764, 68, 110, 4624, 14946, 43990, 57184, 44538, 14406, 4624, 110, 178, 12100, 51384, 209050, 382288

Offset

1,1

Comments

Table starts

..2....4.....6......10.......16........26.........42..........68...........110

..4...16....36.....100......256.......676.......1764........4624.........12100

..6...36...102.....378.....1260......4374......14946.......51384........176238

.10..100...370....1970.....9040.....43990.....209050.....1002960.......4793390

.16..256..1232....9168....57184....382288....2485392....16340928.....106947696

.26..676..4238...44538...379444...3511534...31431114...285153752....2572767886

.42.1764.14406..212814..2472540..31569510..388134978..4844843724...60105117534

.68.4624.49164.1022652.16206848.285774964.4829044276.82999241712.1416863447084

Links

R. H. Hardin, Table of n, a(n) for n = 1..650

Example

Some solutions for n=4 k=3
..0..1..0....0..1..1....0..1..0....1..0..0....1..1..0....1..1..0....0..1..1
..0..1..1....1..1..0....0..1..1....0..1..1....1..1..0....0..1..0....0..1..1
..0..1..1....1..1..0....1..1..1....0..1..1....1..0..0....0..1..1....0..1..0
..0..1..0....0..1..0....1..0..0....1..1..1....1..0..1....1..0..1....0..1..0

Crossrefs

Column 1 is A006355(n+2)

Column 2 is A206981

Column 3 is A207249

Row 1 is A006355(n+2)

Row 2 is A206981

Row 3 is A060521

Sequence in context: A208780 A206987 A207845 * A002086 A039830 A159788

Adjacent sequences: A207805 A207806 A207807 * A207809 A207810 A207811

Keyword

nonn,tabl

Author

R. H. Hardin Feb 20 2012

Status

approved