The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A212092 Number of (w,x,y,z) with all terms in {1,...,n} and w^2
 0, 1, 15, 73, 231, 562, 1155, 2133, 3632, 5801, 8830, 12907, 18264, 25131, 33766, 44461, 57524, 73274, 92043, 114213, 140173, 170289, 205057, 244884, 290251, 341658, 399594, 464582, 537200, 618046, 707665, 806727, 915828, 1035607 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS a(n)+A212095(n)=n^4. For a guide to related sequences, see A211795. LINKS MATHEMATICA t = Compile[{{n, _Integer}}, Module[{s = 0}, (Do[If[w^2 < x^2 + y^2 + z^2, s = s + 1], {w, 1, #}, {x, 1, #}, {y, 1, #}, {z, 1, #}] &[n]; s)]]; Map[t[#] &, Range[0, 50]] (* A212092 *) (* Peter J. C. Moses, Apr 13 2012 *) CROSSREFS Cf. A211795. Sequence in context: A000476 A002603 A212562 * A022817 A171341 A080841 Adjacent sequences:  A212089 A212090 A212091 * A212093 A212094 A212095 KEYWORD nonn AUTHOR Clark Kimberling, May 02 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified August 8 14:04 EDT 2020. Contains 336298 sequences. (Running on oeis4.)