T(n,k)=Number of ways to reciprocally link elements of an nXk array either to themselves or to exactly two king-move neighbors, without consecutive collinear links.
A220718
T(n,k)=Number of ways to reciprocally link elements of an nXk array either to themselves or to exactly two king-move neighbors, without consecutive collinear links.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =8a(5) =1a(6) =1a(7) =26a(8) =26a(9) =1a(10) =1a(11) =118a(12) =226a(13) =118a(14) =1a(15) =1a(16) =463a(17) =2243a(18) =2243a(19) =463a(20) =1a(21) =1a(22) =1930a(23) =21195a(24) =72923a(25) =21195a(26) =1930a(27) =1a(28) =1a(29) =7843
External references
- oeis: A220718