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A134951 Mountain primes. 16
131, 151, 181, 191, 1231, 1291, 1321, 1361, 1381, 1451, 1471, 1481, 1531, 1571, 1621, 1721, 1741, 1831, 1861, 1871, 1931, 1951, 12391, 12421, 12451, 12491, 12541, 12641, 12671, 12721, 12781, 12791, 12821, 12841, 12941, 13421, 13451, 13591, 13681 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Mountain numbers that are prime numbers.

This sequence has 2620 terms. The largest is 134567897654321. [From Jud McCranie, Feb 23 2009, Feb 24 2009]

REFERENCES

Chris K. Caldwell and G. L. Honaker, Jr; Prime Curios!, The Dictionary of Prime Number Trivia, CreateSpace (2009), p. 69, 216, 217.

LINKS

Giovanni Resta, Table of n, a(n) for n = 1..2620 (full sequence)

G. L. Honaker, Jr. and Chris K. Caldwell, Prime Curios! 2620

FORMULA

A000040 INTERSECT A134941.

A178333(a(n))*A010051(a(n)) = 1. [From Reinhard Zumkeller, May 25 2010]

EXAMPLE

The A-number of this sequence (A134951) is a mountain prime because 134951 is a mountain number and it is also a prime number.

. . . 9 . .

. . . . . .

. . . . . .

. . . . . .

. . . . 5 .

. . 4 . . .

. 3 . . . .

. . . . . .

1 . . . . 1

CROSSREFS

Cf. A000040, A134941.

Sequence in context: A045164 A167845 A273049 * A173071 A164294 A155924

Adjacent sequences:  A134948 A134949 A134950 * A134952 A134953 A134954

KEYWORD

fini,full,nonn,base

AUTHOR

Omar E. Pol, Nov 25 2007

EXTENSIONS

Edited by Omar E. Pol, Feb 26 2009

More terms from Max Alekseyev, Feb 06 2010

Minor edit and reference added by Omar E. Pol, Mar 25 2011

STATUS

approved

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Last modified February 18 15:08 EST 2018. Contains 299324 sequences. (Running on oeis4.)