A106267 Least c such that A106265(n) + b^2 = c^3 for some b (given in A106266)

1, 3, 2, 2, 2, 3, 17, 4, 3, 7, 6, 3, 5, 3, 3, 4, 11, 4, 14, 5, 21, 6, 4, 65, 9, 7, 4, 18, 4, 5, 4, 4, 23, 8, 6, 99, 5, 20, 13, 27, 7, 5, 6, 5, 9, 11, 143, 5, 8, 5, 7, 5, 5, 5, 15, 16, 12, 6, 47, 14, 195, 7, 197, 175, 8, 6, 9, 51, 10, 6, 59, 13, 7, 11, 6

Offset

1,2

Links

M. F. Hasler, Table of n, a(n) for n = 1..2240

Formula

A106267(n) = (A106265(n) + A106266(n)^2)^(1/3). - M. F. Hasler, Oct 04 2013

Prog

(PARI) for(a=1, 999, for(c=sqrtn(a, 3)\1, (a+9)*99, issquare(c^3-a, &b)&!print1(c", ")&break)) \\ - M. F. Hasler, Oct 04 2013
(PARI) A106267(n)={for(c=sqrtn(a=A106265(n), 3)\1, 9e9, issquare(c^3-a)&return(c))} \\ - M. F. Hasler, Oct 05 2013

Crossrefs

Sequence in context: A283469 A163751 A067279 * A096101 A104890 A064123

Adjacent sequences: A106264 A106265 A106266 * A106268 A106269 A106270

Keyword

nonn

Author

Zak Seidov, Apr 28 2005

Extensions

More terms from Robert G. Wilson v, Apr 28 2005

All values recomputed from A106266 and A106265 by R. J. Mathar, Aug 24 2008

Initial term 1 and other solutions with b=0 added by M. F. Hasler, Oct 04 2013

Status

approved