The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A212063 Number of (w,x,y,z) with all terms in {1,...,n} and w^2
 0, 0, 8, 50, 169, 440, 943, 1796, 3118, 5090, 7877, 11683, 16708, 23253, 31552, 41892, 54589, 70030, 88524, 110484, 136289, 166434, 201327, 241465, 287278, 339444, 398407, 464742, 539068, 622021, 714192, 816319, 929007, 1053100 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS a(n)+A212064(n)=n^4. For a guide to related sequences, see A211795. LINKS Table of n, a(n) for n=0..33. MATHEMATICA t = Compile[{{n, _Integer}}, Module[{s = 0}, (Do[If[w^2 < x*y*z, s = s + 1], {w, 1, #}, {x, 1, #}, {y, 1, #}, {z, 1, #}] &[n]; s)]]; Map[t[#] &, Range[0, 50]] (* A212063 *) (* Peter J. C. Moses, Apr 13 2012 *) CROSSREFS Cf. A211795. Sequence in context: A301487 A299686 A133426 * A300318 A290617 A163228 Adjacent sequences: A212060 A212061 A212062 * A212064 A212065 A212066 KEYWORD nonn AUTHOR Clark Kimberling, Apr 30 2012 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 30 21:59 EDT 2023. Contains 365812 sequences. (Running on oeis4.)