42079
domain: N
Appears in sequences
- Numbers k such that |2^k - k^5| is prime.at n=15A075981
- Expansion of e.g.f. exp(x)/(1-x)^3.at n=6A082030
- Square array read by antidiagonals: form the Euler-Seidel matrix for the sequence {k!} and then divide column k by k!.at n=38A143409
- Numerator of Sum_{i = 1..n} (if(isprime(i), 0, 1/i)).at n=23A282501
- Numerator of the sum of the reciprocals of the first n nonprimes.at n=14A282511
- a(n) = a(n-1) + a(n-2) + 2 a([n/2]), where a(0) = 1, a(1) = 1, a(2) = 1.at n=20A298346