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A176986 Numbers k such that the k-th sum of two successive primes is a twin prime average. 2
3, 4, 6, 8, 10, 19, 25, 30, 50, 62, 63, 79, 80, 85, 112, 117, 120, 127, 131, 140, 145, 149, 159, 175, 177, 217, 235, 261, 264, 289, 303, 309, 319, 320, 333, 335, 373, 382, 394, 401, 402, 410, 436, 442, 446, 456, 462, 469, 471, 476, 477, 487, 513, 525, 527, 537 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

FORMULA

{k: A001043(k) in A014574}.

MAPLE

A001043 := proc(n) ithprime(n)+ithprime(n+1) ; end proc:

A014574 := proc(n) (A001359(n)+A006512(n))/2 ; end proc:

isA014574 := proc(n) local k ; for k from 1 do av := A014574(k) ; if av> n then return false; elif av=n then return true; end if; end do; end proc:

for n from 1 to 800 do if isA014574(A001043(n) ) then printf("%d, ", n) ; end if; end do: # R. J. Mathar, Apr 30 2010

CROSSREFS

Cf. A001043, A001359, A014574.

Sequence in context: A262892 A109441 A277319 * A325455 A069357 A337455

Adjacent sequences:  A176983 A176984 A176985 * A176987 A176988 A176989

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Apr 30 2010

EXTENSIONS

Corrected (95 replaced by 85, 394 inserted) and extended by R. J. Mathar, Apr 30 2010

STATUS

approved

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Last modified April 22 15:41 EDT 2021. Contains 343177 sequences. (Running on oeis4.)