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A214275
Number of compositions of n where the difference between largest and smallest parts equals 6 and adjacent parts are unequal.
2
0, 2, 1, 8, 12, 23, 56, 100, 191, 370, 703, 1280, 2409, 4437, 8076, 14821, 26895, 48760, 88102, 158831, 285490, 512395, 917768, 1640448, 2928758, 5220037, 9291968, 16519618, 29335963, 52038382, 92218708, 163272053, 288813272, 510469514, 901536574, 1591035005
OFFSET
7,2
LINKS
EXAMPLE
a(8) = 2: [7,1], [1,7].
a(9) = 1: [1,7,1].
a(10) = 8: [8,2], [7,2,1], [7,1,2], [2,8], [2,7,1], [2,1,7], [1,7,2], [1,2,7].
a(11) = 12: [7,3,1], [7,1,3], [7,1,2,1], [3,7,1], [3,1,7], [2,1,7,1], [1,7,3], [1,7,2,1], [1,7,1,2], [1,3,7], [1,2,7,1], [1,2,1,7].
CROSSREFS
Column k=6 of A214269.
Sequence in context: A214272 A214273 A214274 * A214276 A214277 A214278
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jul 09 2012
STATUS
approved