OFFSET
0,10
PROG
(PARI) A358638(n) = if(n<2, 1, !isprime(n)+sum(k=1, (n-1)\2, !(isprime(k)+isprime(n-k)))); \\ Antti Karttunen, Nov 25 2022
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Nov 24 2022
STATUS
approved