A167853 - OEIS

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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

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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: A357262 A340113 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