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approved
Alois P. Heinz, <a href="/A242842/b242842.txt">Table of n, a(n) for n = 4..500</a>
a(4) = 2: ([1,3), (], [3,1)].
a(5) = 3: [1,1,3], [1,3,1], [3,1,1].
a(6) = 6: [1,1,1,3], [1,1,3,1], [1,3,1,1], [3,1,1,1], [1,5], [5,1].
a(4) = 2: (1,3), (3,1).
allocated for Alois P. Heinz
Number of compositions of n with difference 2 between the number of odd parts and the number of even parts, both counted without multiplicity.
2, 3, 6, 11, 20, 25, 41, 85, 148, 355, 751, 1701, 3756, 8255, 17513, 37038, 76349, 156618, 317591, 639142, 1279302, 2546711, 5057675, 10010975, 19788607, 39058684, 77055159, 151930328, 299600229, 590849561, 1165782514, 2301229945, 4545782370, 8985884632
4,1
Column k=2 of A242626.
allocated
nonn
Alois P. Heinz, May 23 2014
approved
editing
allocated for Alois P. Heinz
allocated
approved