A186664 Total number of n-digit numbers requiring 9 positive biquadrates in their representation as sum of biquadrates.

1, 5, 72, 842, 7755, 68550, 614030, 6014243, 60013964, 600013863, 6000013912

Offset

1,2

Comments

A102831(n) + A186650(n) + A186652(n) + A186654(n) + A186656(n) + A186658(n) + A186660(n) + A186662(n) + a(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) = A186663(n) - A186663(n-1).

Crossrefs

Cf. A003343, A186663.

Sequence in context: A120808 A092204 A079874 * A223128 A079340 A268782

Adjacent sequences: A186661 A186662 A186663 * A186665 A186666 A186667

Keyword

nonn,base,more,changed

Author

Martin Renner, Feb 25 2011

Extensions

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

Status

approved