a(n) = Pell(n)*A122859(n) for n>=1, with a(0)=1, where A122859 lists the coefficients in phi(-q)^3/phi(-q^3) and phi() is a Ramanujan theta function.

A209452

a(n) = Pell(n)*A122859(n) for n>=1, with a(0)=1, where A122859 lists the coefficients in phi(-q)^3/phi(-q^3) and phi() is a Ramanujan theta function.

Terms

    a(0) =1a(1) =-6a(2) =24a(3) =-30a(4) =-72a(5) =0a(6) =840a(7) =-2028a(8) =4896a(9) =-5910a(10) =0a(11) =0a(12) =-83160a(13) =-401532a(14) =1938768a(15) =0a(16) =-2824992a(17) =0a(18) =32930520a(19) =-79501308a(20) =0a(21) =-463367580a(22) =0a(23) =0a(24) =6520076640a(25) =-7870428726a(26) =76003583088a(27) =-45872220270a(28) =-221490672624a(29) =0

External references