A004035 - OEIS

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A004035

The coding-theoretic function A(n,4,5).
(Formerly M2729)

1

0, 1, 1, 3, 8, 18, 36, 66, 80

(list; graph; refs; listen; history; text; internal format)

OFFSET

4,4

COMMENTS

The first open case is A(13,4,5) >= 123.

REFERENCES

CRC Handbook of Combinatorial Designs, 1996, p. 411.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=4..12.

A. E. Brouwer, Bounds for binary constant weight codes

A. E. Brouwer, J. B. Shearer, N. J. A. Sloane and W. D. Smith, New table of constant weight codes, IEEE Trans. Info. Theory 36 (1990), 1334-1380.

Index entries for sequences related to A(n,d,w)

CROSSREFS

Sequence in context: A055278 A293349 A036628 * A169763 A227161 A241080

Adjacent sequences: A004032 A004033 A004034 * A004036 A004037 A004038

KEYWORD

nonn,hard,more

AUTHOR

N. J. A. Sloane

EXTENSIONS

a(4) corrected by Pontus von Brömssen, Dec 12 2018

STATUS

approved