A030472 Primes which when concatenated with next 3 primes are also prime.

2, 67, 83, 139, 149, 383, 503, 557, 577, 587, 601, 613, 727, 937, 1181, 1259, 1451, 1453, 1489, 1531, 1621, 1657, 1831, 1879, 1907, 2269, 2441, 2531, 2897, 3191, 3709, 3779, 4057, 4153, 4373, 4603, 4871, 5197, 5233, 5261, 5279, 5417, 5711

Offset: 1

Author

Patrick De Geest

Keywords

• nonn
• base

Links

• Paolo P. Lava, Table of n, a(n) for n = 1..1500

Crossrefs

Cf. A000040.