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A169833
a(n) = 25*2^(n+3) - (198+392*n/3+36*n^2+10*n^3/3).
1
2, 32, 170, 596, 1690, 4232, 9802, 21580, 45946, 95680, 196362, 399172, 806490, 1623096, 3258570, 6532092, 13082042, 26185200, 52395146, 104819060, 209671322, 419380712, 838804810, 1677658796, 3355373050, 6710808352, 13421686282, 26843450020, 53686985946
OFFSET
0,1
COMMENTS
The formula given in the reference (in Eq. (9)) is wrong.
LINKS
B. Berselli, Table of n, a(n) for n = 0..1000 [From Bruno Berselli, Jun 04 2010]
P. Nissen and J. Taylor, Running clubs - a combinatorial investigation, Math. Mag., 64 (No. 1, 1991), 39-44.
FORMULA
From Bruno Berselli, Jun 04 2010: (Start)
G.f.: 2*(1+10*x+3*x^2-4*x^3)/[(1-2*x)*(1-x)^4]
a(n)-6*a(n-1)+14*a(n-2)-16*a(n-3)+9*a(n-4)-2*a(n-5) = 0, with n>4. (End)
CROSSREFS
Sequence in context: A236550 A012642 A244730 * A228582 A128789 A356345
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jun 01 2010
STATUS
approved