48178

Appears in sequences

• Expansion of (1+x^3*C^3)*C^3, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.at n=9A071736
• a(n) is the genus of the modular curve associated to the principal congruence subgroup of level p(n), where p(n) is the n-th prime number.at n=26A191590
• Series reversion of x+x^2+2*x^3.at n=11A217361
• a(n) = (n + 1)*(2*n + 1)*(4*n + 9)/3.at n=25A269342