A071086 - OEIS

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A071086

Number of integers of the form (nk)^2/(n^2+k^2), k>=1.

2

0, 1, 0, 1, 1, 1, 0, 1, 0, 5, 0, 1, 0, 1, 2, 1, 1, 1, 0, 6, 0, 1, 0, 1, 1, 3, 0, 1, 0, 7, 0, 1, 0, 2, 1, 1, 1, 1, 1, 6, 0, 1, 0, 1, 2, 1, 0, 1, 0, 6, 1, 3, 0, 1, 1, 1, 0, 3, 0, 8, 0, 1, 0, 1, 4, 1, 0, 3, 0, 6, 0, 1, 0, 2, 2, 1, 0, 4, 0, 6, 0, 2, 0, 1, 3, 1, 0, 1, 0, 7, 0, 1, 0, 1, 1, 1, 0, 1, 0, 7, 1, 3, 0, 3, 2

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OFFSET

1,10

LINKS

Table of n, a(n) for n=1..105.

PROG

(PARI) for(n=1, 100, print1(sum(i=1, n^2, if((n*i)^2%(i^2+n^2), 0, 1)), ", "))

CROSSREFS

Sequence in context: A286277 A225749 A227985 * A339208 A198105 A347683

Adjacent sequences: A071083 A071084 A071085 * A071087 A071088 A071089

KEYWORD

easy,nonn

AUTHOR

Benoit Cloitre, May 26 2002

STATUS

approved