101920

Appears in sequences

• Low temperature series for spin-1/2 Ising specific heat on 2D square lattice, multiplied by 4.at n=5A029873
• a(n) = gcd(d(n!^3), d(n!)), where d() is the number of divisors function.at n=27A069783
• Decagonal numbers divisible by 10.at n=32A117797
• Triangle T, read by rows, where g.f. of row n of T^n = (y + n*(n+1))^n for n>=0 and T^n denotes the n-th matrix power of T.at n=32A132875
• A certain partition array in Abramowitz-Stegun order (A-St order), called M_3(4)/M_3.at n=47A134150
• a(n) = n*(n+1)*(5*n+1)/3.at n=39A174814
• Positive numbers m such that m^2 - 1 divides 4^m - 1.at n=35A271842
• Triangle read by rows, T(n, k) = Bell(k) * |Stirling1(n, k)|.at n=41A355260