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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. - 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. - 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 January 22 05:19 EST 2022. Contains 350481 sequences. (Running on oeis4.)