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 1 elements linked to themselves.
A271610
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 1 elements linked to themselves.
Terms
- a(0) =1a(1) =3a(2) =2a(3) =6a(4) =240a(5) =2238a(6) =2196a(7) =37004a(8) =20454036a(9) =970623228a(10) =2317631400a(11) =216893681800
External references
- oeis: A271610