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.

Showing 1-2 of 2 results.

A008840 Number of monotone self-dual Boolean functions of n variables that are inequivalent under the symmetric group.

Original entry on oeis.org

0, 1, 1, 2, 3, 7, 30, 716
Offset: 0

Views

Author

Daniel E. Loeb

Keywords

References

  • D. E. Knuth, The Art of Computer Programming, Vol. 4A, Section 7.1.1, p. 79.

Links

Crossrefs

Cf. A003180, A057132, A108803.
Cf. A107765 (non-isomorphic self dual monotones = differences of A008840?). - Olivier Gérard, Oct 11 2012

A107766 Number of self-dual monotonic Boolean functions on n variables (where the result depends on all n variables).

Original entry on oeis.org

1, 0, 1, 4, 46, 2284, 1405428, 229798671816, 423295097006496421879
Offset: 1

Views

Author

Don Knuth, Jun 11 2005

Keywords

Links

  • Hans-J. Bandelt and Jarmila Hedlíková, Median algebras, Discrete Mathematics, 45 (1983), 1-30.

Crossrefs

Cf. A001206, A107765.

Formula

A001206(n) = Sum_{k=1..n} binomial(n,k)*a(k).

Extensions

a(7)-a(8) from Vladeta Jovovic, Jun 13 2005
a(9) (using formula) from Pontus von Brömssen, Dec 29 2023
Showing 1-2 of 2 results.

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

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