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A105048 Numbers n such that prime(n+2) - ( prime(n+1)-prime(n) ) is a semiprime. 0
1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 16, 17, 18, 19, 20, 21, 22, 23, 24, 28, 29, 31, 32, 34, 35, 37, 38, 42, 45, 47, 50, 51, 52, 53, 56, 60, 63, 65, 66, 67, 68, 70, 71, 72, 74, 76, 77, 79, 80, 83, 84, 85, 86, 87, 95, 96, 97, 99, 100, 101, 103, 105, 106, 111, 113, 114, 115 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..69.

PROG

(PARI) isok(n) = bigomega(prime(n+2) - (prime(n+1)-prime(n))) == 2  \\ Michel Marcus, Jun 03 2013

CROSSREFS

Cf. A104243.

Sequence in context: A216442 A298296 A099474 * A026511 A321153 A304814

Adjacent sequences:  A105045 A105046 A105047 * A105049 A105050 A105051

KEYWORD

easy,nonn

AUTHOR

Giovanni Teofilatto, Apr 04 2005

EXTENSIONS

More terms from Rick L. Shepherd, May 18 2005

STATUS

approved

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Last modified September 16 08:51 EDT 2019. Contains 327091 sequences. (Running on oeis4.)