A088909 - OEIS

A088909

Numbers expressible as the sum of squares of two distinct primes.

13, 29, 34, 53, 58, 74, 125, 130, 146, 170, 173, 178, 194, 218, 290, 293, 298, 314, 338, 365, 370, 386, 410, 458, 482, 530, 533, 538, 554, 578, 650, 698, 818, 845, 850, 866, 890, 962, 965, 970, 986, 1010, 1082, 1130, 1202, 1250, 1322, 1370, 1373, 1378, 1394

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OFFSET

1,1

LINKS

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

EXAMPLE

a(1)=3*3+2*2=13, a(2)=5*5+2*2=29.

MATHEMATICA

Union[Total/@(Subsets[Prime[Range[20]], {2}]^2)] (* Harvey P. Dale, Nov 16 2013 *)

CROSSREFS

Cf. A001481, A088908.

Sequence in context: A320868 A347816 A319167 * A340919 A345705 A322388

Adjacent sequences: A088906 A088907 A088908 * A088910 A088911 A088912

KEYWORD

nonn

AUTHOR

Hugo Pfoertner, Oct 22 2003

STATUS

approved