OFFSET
1,1
LINKS
David A. Corneth, Table of n, a(n) for n = 1..10000 (first 1000 terms from T. D. Noe)
Eric Weisstein's World of Mathematics, Biquadratic Number.
EXAMPLE
From David A. Corneth, Aug 03 2020: (Start)
4422 is in the sequence as 4422 = 1^4 + 2^4 + 2^4 + 3^4 + 4^4 + 4^4 + 5^4 + 5^4 + 5^4 + 5^4 + 6^4.
6611 is in the sequence as 6611 = 1^4 + 3^4 + 4^4 + 4^4 + 4^4 + 4^4 + 4^4 + 4^4 + 6^4 + 6^4 + 7^4.
7286 is in the sequence as 7286 = 2^4 + 2^4 + 2^4 + 2^4 + 3^4 + 3^4 + 3^4 + 3^4 + 3^4 + 4^4 + 9^4. (End)
MATHEMATICA
With[{nn=5}, Select[Union[Total/@Tuples[Range[nn]^4, 11]], #<=nn^4-10&]] (* Harvey P. Dale, Jul 20 2022 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
Incorrect program removed by David A. Corneth, Aug 03 2020
STATUS
approved