OFFSET
0,1
COMMENTS
Apart from initial term(s), dimension of the space of weight 2n cusp forms for Gamma_0( 59 ).
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..5000
Tanya Khovanova, Recursive Sequences
William A. Stein, Dimensions of the spaces S_k(Gamma_0(N))
William A. Stein, The modular forms database
Index entries for linear recurrences with constant coefficients, signature (2,-1).
FORMULA
a(n) = 10*n + 4; a(n) = 2*a(n-1) - a(n-2). - Vincenzo Librandi, May 29 2011
G.f.: 2*(2+3*x)/(x-1)^2 . - R. J. Mathar, Mar 20 2018
MATHEMATICA
Range[4, 1000, 10] (* Vladimir Joseph Stephan Orlovsky, May 28 2011 *)
PROG
(Magma) [10*n+4: n in [0..60]]; // Vincenzo Librandi, May 29 2011
(PARI) a(n)=10*n+4 \\ Charles R Greathouse IV, Jul 10 2016
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved