A247252 Smallest integer k>=1 such that k*prime(n) is the sum of two successive primes.
4, 4, 1, 6, 18, 4, 4, 8, 6, 24, 6, 6, 10, 4, 12, 24, 8, 20, 4, 12, 20, 28, 18, 8, 12, 18, 6, 12, 8, 22, 4, 6, 4, 12, 8, 6, 24, 6, 4, 36, 18, 36, 20, 4, 24, 20, 30, 4, 24, 6, 16, 52, 6, 18, 6, 30, 42, 18, 30, 24, 4, 6, 24, 6, 6, 8, 8, 6, 12, 12, 24, 8, 26, 12, 10, 16, 6, 12, 8, 42, 14, 10, 18, 6, 8, 12, 30, 36, 48, 22, 12, 14, 4, 12, 20, 16, 6, 6, 6, 20
Offset: 1
Keywords
Examples
If n=1, prime(1)=2, and 4*2 = 8 = 3+5 is the sum of two consecutive primes, thus a(1) = 4.
Links
- Zak Seidov, Table of n, a(n) for n = 1..1000
Formula
a(n) = A203836(n)/prime(n).
Comments