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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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A140699 Triangle read by rows: A054524*A140256.

Original entry on oeis.org

1, 2, -1, 3, 0, -1, 2, -2, 0, 0, 5, 0, 0, 0, -1, 1, -3, -2, 0, 0, 1, 7, 0, 0, 0, 0, 0, -1, 2, -2, 0, 0, 0, 0, 0, 0, 3, 0, -3, 0, 0, 0, 0, 0, 0, 1, -5, 0, 0, -2, 0, 0, 0, 0, 1, 11, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 1, -1, -2, 0, 0, 2, 0, 0, 0, 0, 0, 0, 13, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 1, -7, 0, 0, 0, 0, -2, 0, 0, 0, 0, 0, 0, 1, 1, 0, -5, 0, -3, 0, 0, 0, 0, 0, 0, 0
Offset: 1

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Author

Mats O. Granvik and Gary W. Adamson, May 24 2008

Keywords

Comments

Row products are A140700. Similar to table A140256. Can perhaps be seen as taking the moebius function of A126988 times the mangoldt function of A126988.

Examples

			1;
2, -1;
3, 0, -1;
2, -2, 0, 0;
5, 0, 0, 0, -1;
1, -3, -2, 0, 0, 1;
7, 0, 0, 0, 0, 0, -1;
2, -2, 0, 0, 0, 0, 0, 0;
3, 0, -3, 0, 0, 0, 0, 0, 0;
1, -5, 0, 0, -2, 0, 0, 0, 0, 1;
11,0, 0, 0, 0, 0, 0, 0, 0, 0, -1;

Crossrefs

Cf. A054524, A140256, A126988, A140700.

Formula

a(n) = A054524*A140256
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