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A242837 Number of compositions of n with difference -4 between the number of odd parts and the number of even parts, both counted without multiplicity. 2

%I #7 May 24 2014 18:53:37

%S 24,0,84,0,288,0,822,0,2226,0,5304,720,15034,10680,55624,84360,265200,

%T 527640,1342608,2886960,6673176,14433240,31725930,67718568,144265370,

%U 302771208,631156708,1303769496,2673673704,5447789784,11028089996,22211684328,44491303391

%N Number of compositions of n with difference -4 between the number of odd parts and the number of even parts, both counted without multiplicity.

%C First odd term is a(52) = 44491303391.

%H Alois P. Heinz, <a href="/A242837/b242837.txt">Table of n, a(n) for n = 20..500</a>

%e a(20) = 24 = 4!: all permutations of {2,4,6,8}.

%Y Column k=-4 of A242626.

%K nonn

%O 20,1

%A _Alois P. Heinz_, May 23 2014

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Last modified March 29 10:59 EDT 2024. Contains 371277 sequences. (Running on oeis4.)