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A087819 z values corresponding to A087818. 1
0, 2, 0, 3, 4, 4, 5, 6, 5, 6, 0, 7, 6, 8, 8, 0, 9, 8, 9, 10, 10, 8, 9, 0, 11, 11, 12, 10, 12, 11, 12, 13, 10, 13, 12, 14, 14, 14, 12, 15, 13, 15, 14, 16, 15, 16, 13, 14, 16, 15, 17, 17, 13, 14, 18, 18, 16, 18, 17, 0, 19, 15, 18, 19, 17, 19, 20, 18, 20, 15, 20, 17, 0, 21, 20, 21, 19, 21 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..78.

PROG

(PARI) fourkp1(n) = { forstep(x=1, n, 4, for(y=1, floor(sqrt(x)), z=x-y^2; if(issquare(z), print1(floor(sqrt(z))" "); break; ) ) ) }

CROSSREFS

Sequence in context: A300001 A137218 A306765 * A290820 A278029 A066246

Adjacent sequences:  A087816 A087817 A087818 * A087820 A087821 A087822

KEYWORD

nonn

AUTHOR

Cino Hilliard, Oct 06 2003

STATUS

approved

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Last modified April 3 19:43 EDT 2020. Contains 333198 sequences. (Running on oeis4.)