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A211800 Number of ordered triples (w,x,y) with all terms in {1,...,n} and 2w^2<x^2+y<2. 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 (list; graph; refs; listen; history; text; internal format)
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, 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

STATUS

approved

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Last modified April 15 20:35 EDT 2021. Contains 342977 sequences. (Running on oeis4.)