A079740 Primes of the form x^2 + y^2 + 2 (x,y positive).

7, 19, 31, 43, 47, 67, 103, 127, 139, 151, 199, 223, 227, 263, 271, 283, 307, 367, 379, 463, 479, 487, 523, 547, 571, 587, 607, 619, 631, 643, 659, 691, 727, 787, 811, 823, 859, 883, 907, 911, 967, 983, 1019, 1039, 1051, 1063, 1231, 1279, 1291, 1303, 1307

Offset

1,1

Links

Table of n, a(n) for n=1..51.

Maple

S := {}: for x from 1 to 100 do for y from 1 to 100 do S := S union {x^2+y^2+2} od:od:S := sort(convert(S, list)): for i from 1 to 500 do if isprime(S[i]) then printf(`%d, `, S[i]) fi:od: # James A. Sellers, Feb 25 2003

Crossrefs

Cf. A079545, A079739.

Sequence in context: A242476 A079021 A216133 * A030549 A017605 A126194

Adjacent sequences: A079737 A079738 A079739 * A079741 A079742 A079743

Keyword

nonn,easy

Author

N. J. A. Sloane, Feb 18 2003

Extensions

More terms from James A. Sellers, Feb 25 2003

Status

approved