The number of partitions of {1..7n} that are invariant under a permutation consisting of n 7-cycles.

A036077

The number of partitions of {1..7n} that are invariant under a permutation consisting of n 7-cycles.

Terms

    a(0) =1a(1) =2a(2) =12a(3) =106a(4) =1144a(5) =14434a(6) =209736a(7) =3451290a(8) =63194936a(9) =1269555762a(10) =27700698344a(11) =651497885482

External references