A186660 Total number of n-digit numbers requiring 7 positive biquadrates in their representation as sum of biquadrates.

1, 5, 77, 1018, 11712, 122460, 1107703, 8829638, 71681321, 638559445, 6064719750

Offset: 1

Author

Martin Renner, Feb 25 2011

Keywords

• nonn
• base
• more

Comments

A102831(n) + A186650(n) + A186652(n) + A186654(n) + A186656(n) + A186658(n) + a(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

• Eric Weisstein's World of Mathematics, Waring's Problem.

Crossrefs

Cf. A003341, A186659.

Formula

a(n) = A186659(n) - A186659(n-1).

Extensions

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