Triangle T, read by rows, where column k equals column k of T^(k+1) shift down 1 row, with T(n,n)=T(n+1,n)=1 for n>=0.
A121391
Triangle T, read by rows, where column k equals column k of T^(k+1) shift down 1 row, with T(n,n)=T(n+1,n)=1 for n>=0.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =2a(8) =1a(9) =1a(10) =1a(11) =5a(12) =3a(13) =1a(14) =1a(15) =1a(16) =15a(17) =12a(18) =4a(19) =1a(20) =1a(21) =1a(22) =55a(23) =58a(24) =22a(25) =5a(26) =1a(27) =1a(28) =1a(29) =252
External references
- oeis: A121391