Number A(n,k) of endofunctions f on [2n] satisfying f^k(i) = i for all i in [n]; square array A(n,k), n>=0, k>=0, read by antidiagonals.
A246070
Number A(n,k) of endofunctions f on [2n] satisfying f^k(i) = i for all i in [n]; square array A(n,k), n>=0, k>=0, read by antidiagonals.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =1a(4) =2a(5) =256a(6) =1a(7) =3a(8) =16a(9) =46656a(10) =1a(11) =2a(12) =50a(13) =216a(14) =16777216a(15) =1a(16) =3a(17) =36a(18) =1626a(19) =4096a(20) =10000000000a(21) =1a(22) =2a(23) =56a(24) =1440a(25) =83736a(26) =100000a(28) =1a(29) =3a(30) =16
External references
- oeis: A246070