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Search: id:A092751
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| A092751 |
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Primes of the form (2*n)!/(n!)^2 - 1. |
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+0
3
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| 5, 19, 251, 48619, 155117519, 30067266499541039, 6637553085023755473070799, 399608854866744452032002440111, 5717214010165655645594487649236004008072121335004636113518216597999
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OFFSET
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1,1
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MATHEMATICA
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Binomial[2#, # ] - 1 & /@ Select[ Range[150], PrimeQ[(2#)!/#!^2 - 1] &] (from Robert G. Wilson v Apr 14 2004)
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CROSSREFS
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Cf. A000984, A066726.
Cf. A075840 = n such that (2*n)!/(n!)^2-1 is prime, A112860 = primes of the form (2*n)!/(n!)^2+1.
Sequence in context: A135171 A058765 A067967 this_sequence A122150 A092663 A144743
Adjacent sequences: A092748 A092749 A092750 this_sequence A092752 A092753 A092754
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KEYWORD
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nonn
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AUTHOR
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Jorge Coveiro (jorgecoveiro(AT)yahoo.com), Apr 12 2004
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EXTENSIONS
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Corrected and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), Apr 14 2004
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