A138381 Numbers which are the sum of a strictly positive square and a square of a prime in two or more ways.

50, 85, 125, 130, 170, 185, 205, 221, 250, 265, 290, 305, 338, 365, 370, 377, 410, 425, 445, 493, 530, 533, 545, 578, 610, 629, 650, 685, 725, 754, 845, 850, 890, 905, 962, 965, 970, 986, 1010, 1037, 1073, 1105, 1130, 1145, 1165, 1205, 1250, 1258, 1313

Offset

1,1

Links

Table of n, a(n) for n=1..49.

Stephan Daniel, On the sum of a square and a square of a prime, Math. Proc. Cambr. Phil. Soc. vol. 131. no. 1 (2001) 1-22.

Index entries for sequences related to sums of squares

Example

50 = 1^2+7^2 = 5^2+5^2. 85 = 6^2+7^2 = 9^2+2^2. 125 = 2^2+11^2 = 10^2+5^2.
425 = 8^2+19^2 = 16^2+13^2 = 20^2+5^2 .

Crossrefs

Sequence in context: A045165 A261286 A259670 * A349208 A224551 A262149

Adjacent sequences: A138378 A138379 A138380 * A138382 A138383 A138384

Keyword

easy,nonn

Author

R. J. Mathar, May 08 2008

Extensions

Typo corrected by Zak Seidov, May 09 2008

Status

approved