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.

A079172 Number of non-associative closed binary operations on a set of order n.

Original entry on oeis.org

0, 8, 19570, 4294963804, 298023223876769393, 10314424798490535546154887938, 256923577521058878088611477224227878265543, 6277101735386680763835789423207666416102355296268686994710, 196627050475552913618075908526912116283103450944214766927276968172610579252347
Offset: 1

Views

Author

Christian van den Bosch (cjb(AT)cjb.ie), Jan 03 2003

Keywords

Comments

Each a(n) is equal to the sum of the products of each element in row n of A079174 and the corresponding element of A079210.

Links

Crossrefs

Cf. A023814, A079173, A079174.

Formula

a(n) = A002489(n) - A023814(n).

Extensions

More terms from Christian G. Bower, Nov 26 2003
More terms from Jinyuan Wang, Mar 02 2020

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

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