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 A108915 Dimensions of the invariant subspaces in a sequence of modules of dimension (n+1)^(n-1) over the symmetric groups S_n. 0
 1, 2, 3, 6, 12, 27, 61, 142, 338, 821, 2010, 4967, 12395, 31165, 78821, 200476, 512546, 1316337, 3394202, 8784064, 22809135, 59407930, 155162456, 406294516, 1066407001, 2805143797, 7393812949, 19525497125, 51653666339, 136872356055 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS FORMULA No simple formula is known, only a complicated sum over partitions. EXAMPLE a(3)=3 in the module M_3 = 3 s_{3} + 6 s_{2,1} + s_{1,1,1}. CROSSREFS Cf. A000272. Sequence in context: A024422 A186771 A019525 * A082395 A061343 A057649 Adjacent sequences:  A108912 A108913 A108914 * A108916 A108917 A108918 KEYWORD nonn AUTHOR F. Chapoton, Jul 18 2005 STATUS approved

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Last modified December 12 00:16 EST 2019. Contains 329946 sequences. (Running on oeis4.)