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A167853 Generalized mountain primes. 7
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

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

LINKS

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

EXAMPLE

Illustration of 136973 as a generalized mountain prime:

. . . 9 . .

. . . . . .

. . . . 7 .

. . 6 . . .

. . . . . .

. . . . . .

. 3 . . . 3

. . . . . .

1 . . . . .

CROSSREFS

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

Sequence in context: A117058 A067173 A090718 * A117703 A039944 A076611

Adjacent sequences:  A167850 A167851 A167852 * A167854 A167855 A167856

KEYWORD

base,fini,full,nonn

AUTHOR

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

EXTENSIONS

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

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

STATUS

approved

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Last modified February 23 23:29 EST 2018. Contains 299595 sequences. (Running on oeis4.)