A118638 Lesser of a twin-prime pair where both are expressible as the sum of two triangular numbers.
11, 29, 137, 191, 461, 659, 821, 1091, 1721, 2027, 2081, 2711, 3359, 3539, 3917, 6131, 6761, 7589, 7877, 7949, 8219, 9461, 9857, 11351, 12107, 12377, 13691, 13997, 14447, 16139, 16229, 17291, 17417, 17579, 18911, 19469, 19541, 19991, 20549, 20639, 20747, 20981
Offset: 1
Keywords
Examples
a(1) = 11 = 1 + 10; a(2) = 29 = 1 + 28.
Links
- Amiram Eldar, Table of n, a(n) for n = 1..10000
Extensions
a(40) inserted by Amiram Eldar, Dec 27 2019
Comments