49774

Appears in sequences

• a(n) = A192525(n)/2.at n=34A192526
• a(n) = n-th third-order hyperharmonic-exponential number, multiplied by n!.at n=5A222146
• a(n) = Sum_{i=0..n} digsum_9(i)^4, where digsum_9(i) = A053830(i).at n=28A231687
• Numbers k such that R_(k+2) + 4*10^k is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=12A256928
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of e.g.f. (1 - (k-1)*log(1 + x))/(1 - k*log(1 + x)).at n=60A334369
• a(n) = n! * [x^n] (1 - (n-1)*log(1 + x))/(1 - n*log(1 + x)).at n=5A335529