38751
domain: N
Appears in sequences
- Number of digits in n-th term of A001387.at n=26A049194
- a(0) = 1, a(n) = 1 + 2*3 + 4*5 + 6*7 + ... + (2n)*(2n+1) for n > 0.at n=30A098931
- a(n) = 62*n^2 + 1.at n=25A158676
- Numbers k such that k * 18^k - 1 is prime.at n=15A299381
- Expansion of 1/( (1 + x) * (1 - x^2*(1 + x)^3) ).at n=19A375364
- Centered pentagonal numbers which are squarefree semiprimes.at n=45A381043
- Centered pentagonal numbers which are semiprimes.at n=46A382132