63986
domain: N
Appears in sequences
- Integers k such that 10^k + 63 is a prime number.at n=27A135115
- First differences of A139334.at n=47A139335
- a(n) = 121*n^2 - n.at n=22A157960
- a(n) = 529*n^2 - 23.at n=10A158633
- Number of n X 3 1..2 arrays containing at least one of each value, and all equal values connected.at n=10A166761
- Numbers k such that sigma(k) = sigma(k+19), where sigma(k) is the sum of the divisors of k.at n=23A321533