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Search: id:A007523
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| A007523 |
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Primes in A092845 (decimal expansion of pi written backwards).
(Formerly M2966)
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+0
3
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| 3, 13, 51413, 951413, 2951413, 53562951413, 979853562951413
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Next term is probably A092845(711), a 712-digit strong pseudo-prime (Baillie-Pomerance-Selfridge-Wagstaff test, cf. PARI/gp documentation) beginning 2116599102453... and ending ...62648323979853562951413.
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REFERENCES
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M. Gardner, Whys and Wherefores, Univ. Chicago Press, 1989, p. 84.
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FORMULA
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Equals A000040 intersect A092845.
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EXAMPLE
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51413 is in the list because it is prime and its decimal reversal, 31415, is the first 5 digits of Pi.
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CROSSREFS
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Cf. A005042, A092845, A011545.
Sequence in context: A087333 A016104 A112856 this_sequence A092830 A105291 A048756
Adjacent sequences: A007520 A007521 A007522 this_sequence A007524 A007525 A007526
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KEYWORD
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base,nonn
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AUTHOR
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njas and Robert G. Wilson v (rgwv(AT)rgwv.com)
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EXTENSIONS
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Edited by M. F. Hasler (www.univ-ag.fr/~mhasler) and njas, Mar 30 2008
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