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 1-3 of 3 results.

A096205 Minimum (absolute value of) permanent of a Hadamard matrix of order 4n.

Original entry on oeis.org

1, 8, 384, 46080, 360448, 219414528, 2755657728, 115595018240
Offset: 0

Views

Author

Ian Wanless, Jul 29 2004

Keywords

Crossrefs

Cf. A096201, A096204, A096206.

A096206 Number of different values taken by the absolute value of the permanent of a Hadamard matrix of order 4n.

Original entry on oeis.org

1, 1, 1, 1, 4, 1, 27, 288
Offset: 0

Views

Author

Ian Wanless, Jul 29 2004

Keywords

Crossrefs

Cf. A096201, A096204, A096205.

A085806 Permanent of the character table of the elementary abelian group (C_2)^n.

Original entry on oeis.org

0, 8, 384, 50692096, 6829323892021002240
Offset: 1

Views

Author

Yuval Dekel (dekelyuval(AT)hotmail.com), Jul 24 2003

Keywords

Comments

a(n) is also the permanent of the Sylvester Hadamard matrix.

References

  • I. M. Wanless, Permanents, Chapter 43 in Handbook of Linear Algebra (2nd ed.), CRC, (2014).

Crossrefs

Cf. A061301, A096204, A096205.

Formula

Ryser's formula or Glynn's formula for computing the permanent.

Extensions

a(5) from Ferenc Szollosi and Ian Wanless, Jul 22 2014
Showing 1-3 of 3 results.

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

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