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A214277
Number of compositions of n where the difference between largest and smallest parts equals 8 and adjacent parts are unequal.
2
0, 2, 1, 8, 12, 23, 56, 100, 196, 380, 729, 1355, 2562, 4777, 8834, 16388, 30110, 55297, 101217, 184784, 336450, 611563, 1109435, 2008818, 3632205, 6557010, 11821718, 21286582, 38285132, 68782625, 123450341, 221358100, 396561946, 709850307, 1269638737
OFFSET
9,2
LINKS
EXAMPLE
a(10) = 2: [9,1], [1,9].
a(11) = 1: [1,9,1].
a(12) = 8: [9,2,1], [9,1,2], [2,9,1], [2,10], [2,1,9], [10,2], [1,9,2], [1,2,9].
a(13) = 12: [9,3,1], [9,1,3], [9,1,2,1], [3,9,1], [3,1,9], [2,1,9,1], [1,9,3], [1,9,2,1], [1,9,1,2], [1,3,9], [1,2,9,1], [1,2,1,9].
CROSSREFS
Column k=8 of A214269.
Sequence in context: A214274 A214275 A214276 * A214278 A214279 A360608
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jul 09 2012
STATUS
approved