A218381 Numbers such that A211996(n) is not zero.

3, 4, 8, 14, 15, 18, 20, 24, 28, 35, 39, 46, 48, 55, 60, 63, 64, 66, 68, 80, 84, 94, 99, 100, 114, 120, 124, 126, 128, 136, 138, 143, 144, 150, 154, 155, 156, 158, 168, 180, 183, 195, 196, 203, 220, 224, 234, 238, 240, 243, 255, 258, 260, 275, 284, 288, 291

Offset

1,1

Comments

For any n, the equation x^4 + a(n)*y^4 = z^2 is solvable in integers. - Arkadiusz Wesolowski, Aug 15 2013

Links

Table of n, a(n) for n=1..57.

D. Clark, An arithmetical function associated with the rank of elliptic curves, Canad. Math. Bull. Vol. 34 (2), 1991 pp. 181-185.

Crossrefs

Cf. A211996, A218382, A228880.

Sequence in context: A250473 A049893 A307043 * A103002 A310012 A181408

Adjacent sequences: A218378 A218379 A218380 * A218382 A218383 A218384

Keyword

nonn

Author

Michel Marcus, Oct 27 2012

Status

approved