A158857 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 A158848

7, 0, 7, 7, 0, 8, 20, 0, 9, 10, 0, 23, 50, 0, 28, 42, 0, 69, 201, 0, 79, 93, 0, 216, 399, 0, 278, 445, 0, 684, 1649, 0, 630, 1008, 0, 2132, 4892, 0, 3066, 3681, 0, 6852

Offset

17,1

Links

Table of n, a(n) for n=17..58.

Crossrefs

Cf. A158848 A156537

Sequence in context: A010678 A010503 A335727 * A255727 A341273 A011438

Adjacent sequences: A158854 A158855 A158856 * A158858 A158859 A158860

Keyword

nonn,uned

Author

Vladimir Shevelev, Mar 28 2009

Status

approved