40329

Appears in sequences

• G.f.: A(x) = exp( Sum_{n>=1} sigma(n)^2*x^n/n ), a power series in x with integer coefficients.at n=14A156302
• a(n) = n! + n + 1.at n=8A213169
• a(n) = 1*2*3*4*5*6*7*8 + 9*10*11*12*13*14*15*16 + 17*18*19*20*21*22*23*24 + ... + (up to n).at n=8A319209
• Numbers k in A228058 such that also A001065(k) is in A228058.at n=48A325380