Triangular matrix T, read by rows, such that the anticommutator of T and U shifts the columns of T up 1 row: {T,U}(n,k) = T(n+1,k), where U denotes the triangular matrix defined by U(n,k) = A000108(n-k) = Catalan(n-k) for n>=k and where T(n,n) = (n+1).
A116077
Triangular matrix T, read by rows, such that the anticommutator of T and U shifts the columns of T up 1 row: {T,U}(n,k) = T(n+1,k), where U denotes the triangular matrix defined by U(n,k) = A000108(n-k) = Catalan(n-k) for n>=k and where T(n,n) = (n+1).
Terms
- a(0) =1a(1) =2a(2) =2a(3) =7a(4) =4a(5) =3a(6) =28a(7) =13a(8) =6a(9) =4a(10) =117a(11) =48a(12) =19a(13) =8a(14) =5a(15) =496a(16) =187a(17) =68a(18) =25a(19) =10a(20) =6a(21) =2110a(22) =748a(23) =257a(24) =88a(25) =31a(26) =12a(27) =7a(28) =8968a(29) =3034
External references
- oeis: A116077