A242845 Number of compositions of n with difference 5 between the number of odd parts and the number of even parts, both counted without multiplicity.

120, 360, 960, 2400, 5364, 11520, 23904, 48000, 94308, 181824, 344832, 643104, 1186224, 2169048, 3928932, 7096092, 12764310, 22970448, 41423646, 75112044, 137278356, 253642356, 474883278, 902578368, 1743300754, 3421941228, 6820887514, 13784976732, 28189089684

Offset

25,1

Comments

First odd term is a(83) = 81415078620107974921.

Links

Alois P. Heinz, Table of n, a(n) for n = 25..500

Example

a(25) = 120 = 5!: all permutations of {1,3,5,7,9}.

Crossrefs

Column k=5 of A242626.

Sequence in context: A269037 A144524 A052768 * A234915 A061218 A321841

Adjacent sequences: A242842 A242843 A242844 * A242846 A242847 A242848

Keyword

nonn

Author

Alois P. Heinz, May 23 2014

Status

approved