Triangular array T: put T(n,0)=n for all n >= 0 and all other T(n,k)=0; then put T(n,k)=Sum{T(i,j): 0<=j<=i-n+k, n-k<=i<=n}.
A054144
Triangular array T: put T(n,0)=n for all n >= 0 and all other T(n,k)=0; then put T(n,k)=Sum{T(i,j): 0<=j<=i-n+k, n-k<=i<=n}.
Terms
- a(0) =0a(1) =1a(2) =1a(3) =2a(4) =3a(5) =7a(6) =3a(7) =5a(8) =14a(9) =36a(10) =4a(11) =7a(12) =21a(13) =60a(14) =164a(15) =5a(16) =9a(17) =28a(18) =84a(19) =246a(20) =700a(21) =6a(22) =11a(23) =35a(24) =108a(25) =328a(26) =980a(27) =2868a(28) =7a(29) =13
External references
- oeis: A054144