2214912domain: NAppears in sequencesSequences from the quartic oscillator.at n=14A228406Coefficients in q-expansion of (E_4 + E_2^2)/2, where E_2 and E_4 are the Eisenstein series shown in A006352 and A004009, respectively.at n=21A282017Expansion of Product_{n>=1} (1 - 4^(n-1)*x^n) * (1 + 4^(n-1)*x^n)^2.at n=11A370434