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 A186685 Total number of n-digit numbers requiring 19 positive biquadrates in their representation as sum of biquadrates. 18
 0, 1, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS A161905(n) + A186650(n) + A186652(n) + A186654(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) + a(n) = A052268(n) a(n) = 0 for n >= 4. - Nathaniel Johnston, May 09 2011 LINKS Table of n, a(n) for n=1..87. Eric Weisstein's World of Mathematics, Waring's Problem. Index entries for linear recurrences with constant coefficients, signature (1). FORMULA a(n) = A186684(n) - A186684(n-1). CROSSREFS Cf. A046050, A099591. Sequence in context: A324220 A273941 A067483 * A341882 A307382 A339629 Adjacent sequences: A186682 A186683 A186684 * A186686 A186687 A186688 KEYWORD nonn,base,easy AUTHOR Martin Renner, Feb 25 2011 STATUS approved

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Last modified December 11 13:16 EST 2023. Contains 367727 sequences. (Running on oeis4.)