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A144589
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Prime(n-th "prime nonprime").
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1
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2, 7, 19, 29, 53, 71, 97, 103, 137, 173, 193, 233, 263, 271, 311, 359, 409, 421, 463, 491, 503, 571, 607, 647, 701, 743, 757, 809, 821, 839, 971, 1009, 1049, 1061, 1151, 1181, 1231, 1283, 1303, 1367, 1429, 1451, 1543, 1553, 1579, 1601, 1699, 1831, 1873, 1879
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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FORMULA
| a(n)=prime(A144570(n)).
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MAPLE
| Contribution from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 01 2010: (Start)
A141468 := proc(n) if n <=2 then n-1; else for a from procname(n-1)+1 do if not isprime(a) then return a; end if; end do: end if; end proc:
A144570 := proc(n) A141468(ithprime(n)) ; end proc:
A144589 := proc(n) ithprime(A144570(n)) ; end proc:
seq(A144589(n), n=1..120) ; (End)
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CROSSREFS
| Cf. A000040, A144570.
Sequence in context: A100408 A103034 A038952 * A179002 A034794 A152608
Adjacent sequences: A144586 A144587 A144588 * A144590 A144591 A144592
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KEYWORD
| nonn
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AUTHOR
| Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jan 07 2009, corrected Jan 12 2009
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EXTENSIONS
| Extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 01 2010
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