A186652 Total number of n-digit numbers requiring 3 positive biquadrates in their representation as sum of biquadrates.

1, 5, 23, 112, 648, 3564, 19820, 110506, 622268, 3501263, 19699896

Offset

1,2

Comments

A102831(n) + A186650(n) + a(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) + 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) = A186651(n) - A186651(n-1).

Crossrefs

Cf. A003337, A186651.

Sequence in context: A017975 A360100 A178873 * A199312 A320326 A299589

Adjacent sequences: A186649 A186650 A186651 * A186653 A186654 A186655

Keyword

nonn,base,more

Author

Martin Renner, Feb 25 2011

Extensions

a(5)-a(11) from Giovanni Resta, Apr 29 2016

Status

approved