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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A118477 Number of nonassociative rings with <= n elements.

Original entry on oeis.org

1, 3, 5, 60, 62, 66, 68, 801356, 801521, 801525, 801527, 801637, 801639, 801643, 801647
Offset: 1

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Author

Jonathan Vos Post, May 05 2006

Keywords

Comments

Partial sums of A037292 Number of nonassociative rings with n elements.

Examples

			a(15) = 1 + 2 + 2 + 55 + 2 + 4 + 2 + 801288 + 165 + 4 + 2 + 110 + 2 + 4 + 4 = 801647.

References

  • "Reviews in Ring Theory, 1980-1984", American Mathematical Society, 1986; ISBN 0-8218-0097-3.

Crossrefs

Cf. A027623, A037292.

Formula

a(n) = Sum_{i=1..n} A037292(i).

Extensions

Data corrected by Giovanni Resta, Jun 16 2016
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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