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A186303 a(n) = ( A007522(n)+1 )/2. 2
4, 12, 16, 24, 36, 40, 52, 64, 76, 84, 96, 100, 112, 120, 132, 136, 156, 180, 184, 192, 216, 220, 232, 240, 244, 252, 300, 304, 316, 324, 360, 364, 372, 376, 412, 420, 432, 444, 456, 460, 484, 492, 496, 516, 520, 532, 544 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
a(n) = A186302(n)+1.
MATHEMATICA
(#+1)/2&/@Select[8*Range[0, 300]+7, PrimeQ] (* Harvey P. Dale, Jul 14 2011 *)
PROG
(PARI) is(n)=n%4==0&&isprime(2*n-1) \\ Charles R Greathouse IV, Jan 22 2013
CROSSREFS
Sequence in context: A328849 A261958 A057962 * A073687 A187084 A090818
KEYWORD
nonn,easy
AUTHOR
Marco Matosic, Feb 17 2011
STATUS
approved

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Last modified February 25 02:17 EST 2024. Contains 370308 sequences. (Running on oeis4.)