A240994 Partial sums of A086505.

10, 21, 44, 75, 104, 157, 230, 283, 372, 529, 602, 739, 938, 1011, 1292, 1521, 1521, 1648, 2031, 2260, 2409, 2798, 3261, 3454, 3813, 4360, 4599, 5066, 5889, 6068

Offset

2,1

Links

Table of n, a(n) for n=2..31.

Example

The second term is obtained by taking the trace of the matrix [[3,5,11],[3,7,13],[5,7,11]].

Maple

Primes:= select(isprime, {seq(2*i+1, i=1..10^5)}):
T:= 3:
for n from 2 to 100 do
  R:= Primes intersect map(`+`, Primes, -2*n);
  if nops(R) < n then break fi;
  T:= T + R[n];
  A[n]:= T;
od:
seq(A[n], n=2..100); # Robert Israel, Aug 06 2014

Crossrefs

Cf. A086505.

Sequence in context: A280435 A095824 A086225 * A014007 A074254 A122963

Adjacent sequences: A240991 A240992 A240993 * A240995 A240996 A240997

Keyword

nonn

Author

Samuel J. Erickson, Aug 06 2014

Extensions

Entry revised by Robert Israel, Aug 07 2014 and N. J. A. Sloane, Sep 30 2014

Status

approved