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

Author

Juri-Stepan Gerasimov, Apr 30 2010

Keywords

• nonn

Links

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

Crossrefs

Cf. A001043, A014574, A167597.

Programs

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)

Formula

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

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

Extensions

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