cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A175370 a(n) = A175369(n^2).

Original entry on oeis.org

1, 9, 81, 137, 321, 609, 1081, 1561, 2137, 3193, 4393, 4889, 6617, 8425, 9529, 11905, 14169, 17097, 18953, 21953, 25105, 29177, 32681, 35937, 41105, 46321, 50529, 55217, 62177, 67665, 74849, 80817, 87185, 96449, 104945, 112609, 120881, 130137
Offset: 0

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Author

R. J. Mathar, Apr 24 2010

Keywords

Comments

Number of integer 4-tuples (x,y,z,u) satisfying |x|^3+|y|^3+|z|^3+|u|^3 <= n^2, -n <= x,y,z <= n. If the cubes were replaced by squares, A055410 would result.

A175371 a(n) = A175369(n^3).

Original entry on oeis.org

1, 9, 89, 617, 2137, 4897, 10625, 19777, 34625, 55217, 84441, 123385, 174329, 243145, 325929, 429329, 557169, 708961, 894625, 1110209, 1363561, 1656505, 1994281
Offset: 0

Views

Author

R. J. Mathar, Apr 24 2010

Keywords

Comments

Number of integer 4-tuples (x,y,z,u) satisfying |x|^3+|y|^3+|z|^3+|u|^3 <= n^3, -n <= x,y,z,u <= n.
An associated sequence with the number of 4-tuples satisfying x^2+y^2+z^2+u^2 <= n^3 starts 1, 9, 321, 3777, 20185, 77313, 230897,...
Showing 1-2 of 2 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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