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A068032 Number of subsets of {1,2,3,...,n} that sum to 0 mod 11. 1
1, 1, 1, 1, 1, 3, 6, 12, 24, 47, 94, 188, 374, 746, 1490, 2978, 5958, 11916, 23832, 47664, 95326, 190652, 381304, 762604, 1525204, 3050404, 6100804, 12201612, 24403224, 48806448, 97612896, 195225788, 390451576, 780903152, 1561806296 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,6
LINKS
FORMULA
Empirical G.f.: -(2*x^11+x^9-x^5+x^4+x^3+x^2+x-1) / ((2*x-1)*(2*x^11-1)). [Colin Barker, Dec 22 2012]
CROSSREFS
11th row of A068009.
Sequence in context: A200662 A264507 A137711 * A293341 A048719 A115807
KEYWORD
nonn
AUTHOR
Antti Karttunen, Feb 11 2002
STATUS
approved

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Last modified March 29 07:27 EDT 2024. Contains 371265 sequences. (Running on oeis4.)