54818

Appears in sequences

• T(2n,n+2), T given by A026769.at n=7A026884
• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 20.at n=10A031608
• McKay-Thompson series of class 26B for Monster.at n=37A058597
• Expansion of q^(-1) * (chi(-q^13) / chi(-q))^2 in powers of q where chi() is a Ramanujan theta function.at n=37A128518
• Expansion of (1/x) * Series_Reversion( x / ((1+x) * B(x)) ), where B(x) is the g.f. of A002293.at n=6A381908