A176984 Numbers k such that the k-th average of twin prime pairs is a sum of two successive primes.

3, 4, 5, 6, 7, 11, 15, 17, 24, 27, 28, 31, 33, 35, 42, 44, 46, 47, 49, 52, 53, 55, 58, 64, 65, 76, 81, 88, 91, 99, 104, 107, 112, 113, 117, 118, 129, 131, 132, 135, 136, 138, 144, 146, 148, 150, 152, 153, 154, 156, 157, 162, 167, 170, 172, 173, 176, 180, 190, 192, 194

Offset

1,1

Links

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

Formula

{k: A014574(k) in A001043}. - R. J. Mathar, Apr 30 2010

A014574(a(n)) = A167597(n). - Amiram Eldar, Jan 21 2020

Maple

From R. J. Mathar, Apr 30 2010: (Start)
isA001043 := proc(n) for k from 1 do ps := ithprime(k)+ithprime(k+1) ; if ps >n then return false; elif ps= n then return true; end if ; end do; end proc:
for n from 1 to 800 do if isA001043(A014574(n) ) then printf("%d, ", n) ; end if; end do: (End)

Crossrefs

Cf. A001043, A014574, A167597.

Sequence in context: A047562 A354270 A137922 * A099562 A210450 A133896

Adjacent sequences: A176981 A176982 A176983 * A176985 A176986 A176987

Keyword

nonn

Author

Juri-Stepan Gerasimov, Apr 30 2010

Extensions

a(42) corrected and sequence extended by R. J. Mathar, Apr 30 2010

Status

approved