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A111248 Dimension of the space of weight 2 modular forms for Gamma_0(n). +0
2
0, 1, 1, 2, 1, 3, 1, 3, 3, 3, 2, 5, 1, 4, 4, 5, 2, 7, 2, 6, 4, 5, 3, 8, 5, 5, 6, 7, 3, 10, 3, 8, 6, 6, 6, 12, 3, 7, 6, 10, 4, 12, 4, 9, 10, 8, 5, 14, 8, 13, 8, 10, 5, 15, 8, 12, 8, 9, 6, 18, 5, 10, 12, 14, 8, 16, 6, 12, 10, 16, 7, 20, 6, 11, 16, 13, 10, 18, 7, 18, 15, 12, 8, 22, 10, 13, 12, 16, 8, 26 (list; graph; listen)
OFFSET

1,4

COMMENT

Equivalently, this is the dimension of the space of level n, weight 2 modular forms.

a(n) = A001617(n) + A001616(n) - 1 [From S. R. Finch (Steven.Finch(AT)inria.fr), Apr 03 2009]

LINKS

S. R. Finch, Modular forms on SL_2(Z)

William A. Stein, The modular forms database

CROSSREFS

Cf. A001616, A001617 [From S. R. Finch (Steven.Finch(AT)inria.fr), Apr 03 2009]

Sequence in context: A048864 A003139 A145652 this_sequence A100714 A050123 A081386

Adjacent sequences: A111245 A111246 A111247 this_sequence A111249 A111250 A111251

KEYWORD

nonn

AUTHOR

S. R. Finch (Steven.Finch(AT)inria.fr), Oct 31 2005

EXTENSIONS

More terms from S. R. Finch (Steven.Finch(AT)inria.fr), Apr 03 2009

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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