Column 3 of triangle A121391, where column k of T=A121391 equals column k of T^(k+1) shift down 1 row.
A121394
Column 3 of triangle A121391, where column k of T=A121391 equals column k of T^(k+1) shift down 1 row.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =22a(4) =146a(5) =1131a(6) =10120a(7) =104015a(8) =1220957a(9) =16253289a(10) =243450538a(11) =4070466861a(12) =75393600728
External references
- oeis: A121394