A242844 Number of compositions of n with difference 4 between the number of odd parts and the number of even parts, both counted without multiplicity.

24, 60, 144, 330, 684, 1374, 2688, 5106, 9532, 17208, 30856, 55296, 97812, 175926, 316928, 581352, 1083674, 2064346, 4012614, 7957492, 16061208, 32880201, 68032764, 141844516, 297086796, 623794222, 1310685218, 2752470170, 5772036942, 12079693049, 25220161732

Offset

16,1

Comments

First odd term is a(37) = 32880201.

Links

Alois P. Heinz, Table of n, a(n) for n = 16..500

Example

a(16) = 24 = 4!: all permutations of {1,3,5,7}.

Crossrefs

Column k=4 of A242626.

Sequence in context: A211571 A240524 A250577 * A185445 A321840 A052759

Adjacent sequences: A242841 A242842 A242843 * A242845 A242846 A242847

Keyword

nonn

Author

Alois P. Heinz, May 23 2014

Status

approved