A211800 Number of ordered triples (w,x,y) with all terms in {1,...,n} and 2*w^2 < x^2 + y^2.

0, 3, 13, 32, 64, 113, 181, 272, 388, 535, 713, 926, 1180, 1475, 1815, 2204, 2646, 3141, 3695, 4312, 4992, 5741, 6563, 7460, 8432, 9485, 10625, 11850, 13166, 14579, 16089, 17696, 19410, 21233, 23161, 25204, 27366, 29647, 32051, 34580

Offset

1,2

Comments

Row 2 of A211802; see A211790 for a discussion and guide to related sequences.

Links

Table of n, a(n) for n=1..40.

Mathematica

(See the program at A211802.)

Crossrefs

Cf. A211790, A211801, A211802.

Sequence in context: A279068 A247216 A301926 * A218922 A061938 A168375

Adjacent sequences: A211797 A211798 A211799 * A211801 A211802 A211803

Keyword

nonn

Author

Clark Kimberling, Apr 22 2012

Extensions

Definition corrected by Georg Fischer, Sep 10 2022

Status

approved