A167853 Generalized mountain primes.

2, 3, 5, 7, 131, 151, 163, 173, 181, 191, 193, 197, 241, 251, 263, 271, 281, 283, 293, 353, 373, 383, 397, 461, 463, 487, 491, 563, 571, 587, 593, 673, 683, 691, 787, 797, 1231, 1283, 1291, 1297, 1321, 1361, 1373, 1381, 1451, 1453, 1471

Offset: 1

Author

Omar E. Pol, Nov 13 2009, Nov 15 2009

Keywords

• base
• fini
• full
• nonn

Comments

Primes in A134853. This sequence is finite because A134853 is.

Superset of A134951, mountain primes.

Question: How many terms are in this sequence?

The last term is a(7145) = 134567897654321. - Giovanni Resta, Mar 19 2013

Examples

			Illustration of 136973 as a generalized mountain prime:
. . . 9 . .
. . . . . .
. . . . 7 .
. . 6 . . .
. . . . . .
. . . . . .
. 3 . . . 3
. . . . . .
1 . . . . .
		

Links

• Giovanni Resta, Table of n, a(n) for n = 1..7145 (full sequence)

Crossrefs

Cf. A000040, A134853, A134941, A134951, A135642, A167845.

Extensions

More terms provided. Harvey P. Dale, Aug 19 2010

a(37)-a(47) corrected by Giovanni Resta, Mar 19 2013