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A100021
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Numbers of the form 3prime(n) - prime(n+1) - 3.
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1
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0, 1, 5, 7, 17, 19, 29, 31, 37, 53, 53, 67, 77, 79, 85, 97, 113, 113, 127, 137, 137, 151, 157, 167, 187, 197, 199, 209, 211, 209, 247, 253, 269, 265, 293, 293, 305, 319, 325, 337, 353, 349, 377, 379, 389, 383, 407, 439, 449, 451, 457, 473, 469, 493, 505, 517, 533, 533, 547
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| Except for the initial term, a(n)==(1,5) mod 6.
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FORMULA
| a(n) = A098764(n) - 3.
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MAPLE
| f:=n->3*ithprime(n)-ithprime(n+1)-3;
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CROSSREFS
| Cf. A099389 for the primes arising in the sequence, A098764.
Sequence in context: A078764 A045318 A040102 * A099389 A099382 A163633
Adjacent sequences: A100018 A100019 A100020 * A100022 A100023 A100024
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KEYWORD
| nonn
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AUTHOR
| Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Nov 20 2004
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EXTENSIONS
| Corrected by Neven Juric (neven.juric(AT)apis-it.hr), rechecked by N. J. A. Sloane (njas(AT)research.att.com), Jun 13 2006
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