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A063140
Dimension of the space of weight 2n cusp forms for Gamma_0( 72 ).
0
5, 28, 52, 76, 100, 124, 148, 172, 196, 220, 244, 268, 292, 316, 340, 364, 388, 412, 436, 460, 484, 508, 532, 556, 580, 604, 628, 652, 676, 700, 724, 748, 772, 796, 820, 844, 868, 892, 916, 940, 964, 988, 1012, 1036, 1060, 1084, 1108, 1132
OFFSET
1,1
FORMULA
Conjecture: a(n) = 24*n-20 for n>1. a(n) = 2*a(n-1)-a(n-2) for n>3. G.f.: x*(5+18*x+x^2)/(1-x)^2. [Colin Barker, Sep 23 2012]
CROSSREFS
Sequence in context: A106679 A341061 A161165 * A316560 A275709 A257093
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jul 08 2001
STATUS
approved