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A242838 Number of compositions of n with difference -3 between the number of odd parts and the number of even parts, both counted without multiplicity. 2
6, 0, 18, 0, 56, 0, 146, 0, 312, 120, 1037, 1440, 4658, 9624, 23906, 52524, 117032, 255732, 542186, 1150920, 2370395, 4902948, 9912558, 20084700, 40045005, 79902108, 157676536, 310969848, 608833717, 1190681692, 2317419418, 4505327884, 8732462296, 16911676140 (list; graph; refs; listen; history; text; internal format)
OFFSET

12,1

LINKS

Alois P. Heinz, Table of n, a(n) for n = 12..500

EXAMPLE

a(12) = 6 = 3!: all permutations of {2,4,6}.

CROSSREFS

Column k=-3 of A242626.

Sequence in context: A308236 A019134 A167298 * A304878 A167356 A219540

Adjacent sequences:  A242835 A242836 A242837 * A242839 A242840 A242841

KEYWORD

nonn

AUTHOR

Alois P. Heinz, May 23 2014

STATUS

approved

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Last modified April 4 08:58 EDT 2020. Contains 333213 sequences. (Running on oeis4.)