A(n,k) is the n-th derivative of f_k at x=1, and f_k is the k-th of all functions that are representable as x^x^...^x with m>=1 x's and parentheses inserted in all possible ways; square array A(n,k), n>=0, k>=1, read by antidiagonals.
A215703
A(n,k) is the n-th derivative of f_k at x=1, and f_k is the k-th of all functions that are representable as x^x^...^x with m>=1 x's and parentheses inserted in all possible ways; square array A(n,k), n>=0, k>=1, read by antidiagonals.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =0a(6) =1a(7) =1a(8) =2a(9) =0a(10) =1a(11) =1a(12) =4a(13) =3a(14) =0a(15) =1a(16) =1a(17) =2a(18) =12a(19) =8a(20) =0a(21) =1a(22) =1a(23) =6a(24) =9a(25) =52a(26) =10a(27) =0a(28) =1a(29) =1
External references
- oeis: A215703