a(n) = Pell(n)*A113973(n) for n>=1, with a(0)=1, where A113973 lists the coefficients in phi(x^3)^3/phi(x) and phi() is a Ramanujan theta function.
A209449
a(n) = Pell(n)*A113973(n) for n>=1, with a(0)=1, where A113973 lists the coefficients in phi(x^3)^3/phi(x) and phi() is a Ramanujan theta function.
Terms
- a(0) =1a(1) =-2a(2) =8a(3) =-10a(4) =24a(5) =0a(6) =280a(7) =-676a(8) =1632a(9) =-1970a(10) =0a(11) =0a(12) =27720a(13) =-133844a(14) =646256a(15) =0a(16) =941664a(17) =0a(18) =10976840a(19) =-26500436a(20) =0a(21) =-154455860a(22) =0a(23) =0a(24) =2173358880a(25) =-2623476242a(26) =25334527696a(27) =-15290740090a(28) =73830224208a(29) =0
External references
- oeis: A209449