T(n,k) = Number of ways to reciprocally link elements of an n X n X n triangular array with themselves or a neighbor, with no more than k elements linked to themselves.
A271617
T(n,k) = Number of ways to reciprocally link elements of an n X n X n triangular array with themselves or a neighbor, with no more than k elements linked to themselves.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =1a(4) =3a(5) =2a(6) =1a(7) =4a(8) =17a(9) =6a(10) =1a(11) =4a(12) =17a(13) =114a(14) =240a(15) =1a(16) =4a(17) =26a(18) =114a(19) =240a(20) =2238a(21) =1a(22) =4a(23) =26a(24) =307a(25) =2571a(26) =2238a(27) =2196a(28) =1a(29) =4
External references
- oeis: A271617