OFFSET
1,6
COMMENTS
Indices of zeros in the sequence are 1, 2, 7, 9, 17, 23, 29, 33, 41, 47, 52, ...
PROG
(PARI) a(n)=sum(k=0, log(n)\log(2), isprime(n-2^k-k^2)) \\ Charles R Greathouse IV, Mar 18 2014
CROSSREFS
KEYWORD
nonn,less
AUTHOR
Irina Gerasimova, Oct 26 2013
EXTENSIONS
Terms corrected by R. J. Mathar, Oct 26 2013
STATUS
approved