A176986 Numbers k such that the k-th sum of two successive primes is a twin prime average.

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

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: A109441 A343883 A277319 * A325455 A337455 A080728

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