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A146981
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Number P of the form q^2, q = prime, such that P-2 is a prime.
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0
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4, 9, 25, 49, 169, 361, 841, 1369, 1849, 2209, 3721, 5041, 7921, 10609, 11449, 16129, 17161, 19321, 29929, 36481, 44521, 49729, 54289, 57121, 66049, 85849, 97969, 113569, 128881, 177241, 196249, 201601, 218089, 241081, 273529, 292681, 323761
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Except for initial term, a(n) - 1 is not squarefree number.
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FORMULA
| a(n) = A049002(n) + 2.
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CROSSREFS
| Cf. A049002.
Sequence in context: A001255 A133019 A028866 * A068373 A068888 A030481
Adjacent sequences: A146978 A146979 A146980 * A146982 A146983 A146984
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KEYWORD
| nonn
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AUTHOR
| Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Nov 04 2008
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EXTENSIONS
| Corrected (3721 inserted, 10321 replaced by 19321, 49729 and 218089 inserted) by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 22 2010
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