572522496

Appears in sequences

• Binomial transform of heptagonal numbers A000566.at n=21A084899
• Expand the real root of y^3 - y + x in powers of x, then multiply coefficient of x^n by -4^n to get integers.at n=11A206300
• Expansion of x / Series_Reversion(x*sqrt(1 + 4*x)).at n=11A224884
• G.f. C(x) satisfies C(x)^(1/2) - S(x)^(1/2) = 1 such that C'(x)*S(x)^(1/2) = S'(x)*C(x)^(1/2) = 72*x.at n=12A299853