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 A178940 Number of flat special rim-hook tableaux. 1

%I #30 Nov 13 2023 10:02:17

%S 1,1,2,3,6,9,18,27,50,79,138,215,378,583,986,1557,2574,4011,6630,

%T 10269,16682,26041,41670,64577,103434,159313,252062,389895,611862,

%U 940437,1474626,2256927,3512906,5384611,8327274,12708827,19646946,29869723,45911834,69859113

%N Number of flat special rim-hook tableaux.

%C See Egge link for precise definition.

%C A composition of n is a sequence of positive integers whose sum is n. The number of flat special rim-hook tableaux is the number of compositions of n (a1, a2, ..., ar) such that (a1+r, a2+r-1, ..., ar+1) are all distinct. - _Mike Zabrocki_, Nov 12 2023.

%H E. Egge et al., <a href="https://doi.org/10.1016/j.ejc.2010.05.010">From quasisymmetric expansions to Schur expansions via a modified inverse Kostka matrix</a>, European Journal of Combinatorics, Volume 31, Issue 8, December 2010, Pages 2014-2027

%Y Cf. A178941.

%K nonn

%O 0,3

%A _N. J. A. Sloane_, Dec 30 2010

%E More terms from _Mike Zabrocki_, Nov 12 2023

%E a(0)=1 prepended and more terms added by _Alois P. Heinz_, Nov 13 2023

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Last modified December 5 23:11 EST 2023. Contains 367594 sequences. (Running on oeis4.)