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A186654
Total number of n-digit numbers requiring 4 positive biquadrates in their representation as sum of biquadrates.
18
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
Eric Weisstein's World of Mathematics, Waring's Problem.
FORMULA
a(n) = A186653(n) - A186653(n-1).
CROSSREFS
Sequence in context: A122371 A083067 A000402 * A152107 A143023 A078009
KEYWORD
nonn,base,more
AUTHOR
Martin Renner, Feb 25 2011
EXTENSIONS
a(5)-a(11) from Giovanni Resta, Apr 26 2016
STATUS
approved