43402

Appears in sequences

• a(n) is the number of divisors of n-th even perfect number.at n=24A061645
• Numbers n such that 4*10^n + 8*R_n - 5 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=16A102998
• Triangle read by rows: row n is the expansion of p(x,n)=If[n == 0, 1, (x + 1)^n + 2^(n - 3)*Sum[(2^(m - 1) +n*m - n + 1)*x^m*(1 + x^(n - 2*m)), {m, 1, n - 1}].at n=56A146967
• Total number of descents in all heapable permutations of length n.at n=8A389991