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Search: id:A072275
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| A072275 |
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Least m such that one less than m-th prime has n divisors (or 0 if no such prime exists). |
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+0
1
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| 2, 3, 4, 7, 6, 0, 11, 12, 30, 0, 18, 0, 44, 79, 47, 0, 42, 0, 53, 106, 1581, 0, 82, 211, 1470, 595, 319, 0, 169, 0, 216, 2819, 177975, 279, 0, 62947, 41203, 326, 0, 647, 0, 1795, 907
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OFFSET
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2,1
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MATHEMATICA
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Do[ If[ !PrimeQ[n], k = 1; While[ Length[ Divisors[ Prime[k] - 1]] != n, k++ ]; Print[k], Print[0]], {n, 6, 34}]
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CROSSREFS
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A000040{a(n)}=A066814(n).
Sequence in context: A026237 A125150 A167151 this_sequence A122989 A077223 A055265
Adjacent sequences: A072272 A072273 A072274 this_sequence A072276 A072277 A072278
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KEYWORD
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more,nonn
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AUTHOR
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Lekraj Beedassy (blekraj(AT)yahoo.com), Jul 09 2002
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 15 2002
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