A186685 Total number of n-digit numbers requiring 19 positive biquadrates in their representation as sum of biquadrates.

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

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