A348117 a(n) is the number of (strict) chains of subspaces with ends 0 and (F_3)^n, counted up to coordinate permutation.

1, 4, 26, 334, 8474, 511198, 81719819

Offset

1,2

Links

Table of n, a(n) for n=1..7.

Formula

a(n) = Sum_{L partition of n} A348114(n, L) * A036038(len(L), sig(L)), where sig(L) is the partition composed by the part multiplicities of L.

Crossrefs

Cf. A348114, A036038, A347841.

Sequence in context: A114125 A063182 A293954 * A317668 A328419 A374745

Adjacent sequences: A348114 A348115 A348116 * A348118 A348119 A348120

Keyword

more,nonn

Author

Álvar Ibeas, Oct 01 2021

Status

approved