A180760 - OEIS

A180760

T(n,k)=half the number of nXk binary arrays with each element equal to at least two neighbors

0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 2, 1, 2, 0, 0, 3, 2, 2, 3, 0, 0, 5, 3, 9, 3, 5, 0, 0, 8, 7, 21, 21, 7, 8, 0, 0, 13, 14, 70, 86, 70, 14, 13, 0, 0, 21, 31, 207, 410, 410, 207, 31, 21, 0, 0, 34, 67, 658, 1874, 2986, 1874, 658, 67, 34, 0, 0, 55, 148, 2059, 8840, 20205, 20205, 8840, 2059, 148

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OFFSET

1,12

COMMENTS

Table starts

.0..0...0....0......0.......0.........0..........0............0.............0

.0..1...1....2......3.......5.........8.........13...........21............34

.0..1...1....2......3.......7........14.........31...........67...........148

.0..2...2....9.....21......70.......207........658.........2059..........6521

.0..3...3...21.....86.....410......1874.......8840........41755........197883

.0..5...7...70....410....2986.....20205.....141313.......986376.......6925085

.0..8..14..207...1874...20205....205020....2141384.....22238670.....232041425