A308516 - OEIS

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A308516

Odd numbers which are not squares and cannot be written as a sum of a prime and a square.

%I #15 Apr 07 2020 01:10:16

%S 85,91,771,1255,1351,21679

%N Odd numbers which are not squares and cannot be written as a sum of a prime and a square.

%C The sequence is probably finite. a(7) > 2000000 (if it exists).

%C a(7) > 1.5*10^11, if it exists. - _Giovanni Resta_, Jul 16 2019

%Y A subsequence of A020495.

%Y Cf. A014090, A065377.

%K nonn,more

%O 1,1

%A _Daniel Starodubtsev_, Jun 03 2019