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A037942 Numbers of the form x^2 + y^2 with x >= 0, y >= 0, gcd(x,y)=1, with multiplicity. 2
1, 2, 5, 10, 13, 17, 25, 26, 29, 34, 37, 41, 50, 53, 58, 61, 65, 65, 73, 74, 82, 85, 85, 89, 97, 101, 106, 109, 113, 122, 125, 130, 130, 137, 145, 145, 146, 149, 157, 169, 170, 170, 173, 178, 181, 185, 185, 193, 194 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)

Eric Weisstein's World of Mathematics, See also

PROG

(PARI) s=14; v=[]; for(y=0, s, for(x=0, y, if(gcd(x, y)==1, r=x*x+y*y; if(r<=s*s, v=concat(v, r))))); vecsort(v) \\ Craig Clapp (craig_clapp(AT)earthlink.net), Apr 30 2010

CROSSREFS

If repetitions are deleted, same as A008784.

Cf. A224770 (multiplicity 2), A281877 (multiplicity >= 3).

Sequence in context: A180161 A099261 A103215 * A008784 A224450 A226828

Adjacent sequences:  A037939 A037940 A037941 * A037943 A037944 A037945

KEYWORD

nonn

AUTHOR

Nissim Broudo (broudo(AT)brain.math.fau.edu)

EXTENSIONS

Missing second instance of 85 (6^2+7^2 = 2^2+9^2 = 85) added by Craig Clapp (craig_clapp(AT)earthlink.net), Apr 30 2010

STATUS

approved

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Last modified June 6 14:04 EDT 2020. Contains 334827 sequences. (Running on oeis4.)