OFFSET
0,5
LINKS
Takeyoshi Kogiso and Koji Tsushima, On an algebra of Siegel modular forms associated with the theta group Gamma_2(1,2), Tsukuba J. Math. 22 (1998), 645-656.
B. Runge, Codes and Siegel modular forms, Discrete Math. 148 (1996), 175-204, p. 203, first displayed formula.
Index entries for linear recurrences with constant coefficients, signature (1,0,0,1,-1,1,-1,0,0,-1,1,1,-1,0,0,-1,1,-1,1,0,0,1,-1).
MAPLE
(1+x^6+x^8+x^10+x^19+x^21+x^23+x^29)/((1-x^4)^2*(1-x^6)*(1-x^12));
MATHEMATICA
Join[{1, 0, 0, 0}, LinearRecurrence[{1, 0, 0, 1, -1, 1, -1, 0, 0, -1, 1, 1, -1, 0, 0, -1, 1, -1, 1, 0, 0, 1, -1}, {2, 0, 2, 0, 4, 0, 5, 0, 9, 0, 9, 0, 15, 0, 17, 1, 23, 1, 27, 3, 36, 3, 39}, 61]] (* Jean-François Alcover, Jul 31 2019 *)
CROSSREFS
KEYWORD
nonn,nice,easy
AUTHOR
STATUS
approved