A(n,k) = !n + [n > 0] * (k * n!), where !n = A000166(n) is subfactorial of n and [] is an Iverson bracket; square array A(n,k), n>=0, k>=0, read by antidiagonals.
A334715
A(n,k) = !n + [n > 0] * (k * n!), where !n = A000166(n) is subfactorial of n and [] is an Iverson bracket; square array A(n,k), n>=0, k>=0, read by antidiagonals.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =1a(4) =1a(5) =1a(6) =1a(7) =2a(8) =3a(9) =2a(10) =1a(11) =3a(12) =5a(13) =8a(14) =9a(15) =1a(16) =4a(17) =7a(18) =14a(19) =33a(20) =44a(21) =1a(22) =5a(23) =9a(24) =20a(25) =57a(26) =164a(27) =265a(28) =1a(29) =6
External references
- oeis: A334715