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A114702
Number of binary vectors (x_1,...x_(n-1)) satisfying Sum_{i=1..n-1} (-1)^i*i*x_i = 0 (mod n).
0
1, 1, 2, 3, 6, 9, 16, 28, 52, 93, 172, 315, 586, 1091, 2048, 3855, 7286, 13797, 26216, 49929, 95326, 182361, 349536, 671088, 1290556, 2485504, 4793492, 9256395, 17895736, 34636833, 67108864, 130150493, 252645136, 490853403, 954437292
OFFSET
2,3
LINKS
Myrto Kallipoliti, Robin Sulzgruber, and Eleni Tzanaki, Patterns in Shi tableaux and Dyck paths, arXiv:2006.06949 [math.CO], 2020.
FORMULA
a(2*n-1) = A000048(2*n-1), a(2*n) = A000016(2*n).
CROSSREFS
Sequence in context: A367205 A327475 A017915 * A026768 A068604 A174023
KEYWORD
easy,nonn
AUTHOR
Vladeta Jovovic, Feb 18 2006
EXTENSIONS
More terms from R. J. Mathar, Jan 24 2008
STATUS
approved