OFFSET
1,8
COMMENTS
k is in A212292 if and only if a((k+1)/2) = 0.
LINKS
Peter Kagey, Table of n, a(n) for n = 1..10000
FORMULA
a(16) = 3 because there are three different ways to represent 16 * 2 - 1 = 31 in the form p^2 + q^2 + r with p, q, and r prime, and p >= q:
2^2 + 2^2 + 23,
3^3 + 3^3 + 13,
5^2 + 2^2 + 2.
CROSSREFS
KEYWORD
nonn
AUTHOR
Peter Kagey, Sep 22 2015
STATUS
approved