A158853 a(n), a(n+1), a(n+2), for n=5,8,11,... are respectively the numbers of representations of the integers 2^k-2, 2^k, 2^k+2, where k=(n+4)/3, by unordered sums of two odd primes not belonging to A158846

2, 0, 3, 1, 0, 1, 5, 0, 3, 6, 0, 7, 18, 0, 8, 10, 0, 21, 50, 0, 26, 43, 0, 67, 204, 0, 79, 93, 0, 213, 398, 0, 279, 445, 0, 684, 1649, 0, 630, 1008, 0, 2135, 4890, 0, 3063, 3681, 0, 6852

Offset

11,1

Links

Table of n, a(n) for n=11..58.

Crossrefs

A158846 A156537

Sequence in context: A303110 A079133 A143143 * A238762 A269517 A190440

Adjacent sequences: A158850 A158851 A158852 * A158854 A158855 A158856

Keyword

nonn,uned

Author

Vladimir Shevelev, Mar 28 2009

Status

approved