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A180972 Numbers n such that 8^9 + n^2 is a square. 0
4096, 14336, 31744, 65024, 130816, 262016, 524224, 1048544, 2097136, 4194296, 8388604, 16777214, 33554431 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..13.

MATHEMATICA

Module[{x, y}, x /. List@ToRules@Reduce[8^9 + x^2 == y^2 && y > x > 0, Integers]] (* Giovanni Resta, Jan 29 2013 *)

x/.Solve[{8^9+x^2==y^2, x>0, y>0}, {x, y}, Integers] (* Harvey P. Dale, Mar 16 2019 *)

PROG

(MAGMA) [n: n in [0..2^25] | IsSquare(8^9+n^2)]; // Vincenzo Librandi, Jan 29 2013

(PARI) is(n)=issquare(8^9+n^2) \\ Charles R Greathouse IV, Jan 29 2013

CROSSREFS

Sequence in context: A043424 A138174 A258735 * A255665 A223334 A231945

Adjacent sequences:  A180969 A180970 A180971 * A180973 A180974 A180975

KEYWORD

nonn,easy,fini,full

AUTHOR

Jason Earls, Sep 30 2010

STATUS

approved

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Last modified February 18 04:48 EST 2020. Contains 332011 sequences. (Running on oeis4.)