A186654 Total number of n-digit numbers requiring 4 positive biquadrates in their representation as sum of biquadrates.

1, 6, 41, 298, 2720, 24688, 232970, 2255588, 22228377, 220476980, 2197066826

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

Table of n, a(n) for n=1..11.

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