A180971 Numbers k such that 6^7 + k^2 is a square.

45, 108, 270, 342, 540, 633, 783, 900, 1242, 1410, 1908, 2155, 2565, 2892, 3870, 4358, 5820, 7767, 8740, 11658, 17492, 23325, 34990, 69983

Offset

1,1

References

Clifford A. Pickover, The Mathematics of Oz: Mental Gymnastics From Beyond The Edge. Cambridge University Press, 2002. Page 252.

Links

Table of n, a(n) for n=1..24.

Jason Earls, Solutions to N^(N+1) + X^2 = Y^2, Scribd.

Prog

(Magma) [n: n in [0..70000] | IsSquare(n^2 + 6^7)]; // Vincenzo Librandi, Jan 29 2013
(PARI) is(n)=issquare(6^7+n^2) \\ Charles R Greathouse IV, Jan 29 2013

Crossrefs

Sequence in context: A144486 A199351 A199517 * A043442 A044232 A044613

Adjacent sequences: A180968 A180969 A180970 * A180972 A180973 A180974

Keyword

nonn,easy,fini

Author

Jason Earls, Sep 30 2010

Status

approved