Column 2 of triangle T=A121395, where column k of T equals column k of T^(2^k) shift down 1 row.
A121397
Column 2 of triangle T=A121395, where column k of T equals column k of T^(2^k) shift down 1 row.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =22a(4) =164a(5) =1837a(6) =34176a(7) =1106012a(8) =63053480a(9) =6385424679
External references
- oeis: A121397