This site is supported by donations to The OEIS Foundation.

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A186654 Total number of n-digit numbers requiring 4 positive biquadrates in their representation as sum of biquadrates. 18
 1, 6, 41, 298, 2720, 24688, 232970, 2255588, 22228377, 220476980, 2197066826 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS A102831(n) + A186650(n) + A186652(n) + a(n) + A186656(n) + A186658(n) + A186660(n) + A186662(n) + A186664(n) + A186666(n) + A186668(n) + A186670(n) + A186672(n) + A186674(n) + A186676(n) + A186678(n) + A186681(n) + A186683(n) + A186685(n) = A052268(n), for n>1. LINKS Eric Weisstein's World of Mathematics, Waring's Problem. FORMULA a(n) = A186653(n) - A186653(n-1). CROSSREFS Cf. A003338, A186653. Sequence in context: A122371 A083067 A000402 * A152107 A143023 A078009 Adjacent sequences:  A186651 A186652 A186653 * A186655 A186656 A186657 KEYWORD nonn,base,more AUTHOR Martin Renner, Feb 25 2011 EXTENSIONS a(5)-a(11) from Giovanni Resta, Apr 26 2016 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 January 20 16:46 EST 2019. Contains 319335 sequences. (Running on oeis4.)