A034359 Number of binary [ n,5 ] codes.

0, 0, 0, 0, 1, 6, 23, 77, 240, 705, 1988, 5468, 14724, 39006, 101818, 261924, 663748, 1655781, 4062110, 9793065, 23186825, 53896597, 122975627, 275449464, 605794093, 1308633243, 2777847319, 5797093774, 11900199553, 24042491094, 47833081481, 93765335118, 181200186060, 345389067067, 649704599010

Offset

1,6

Links

Table of n, a(n) for n=1..35.

H. Fripertinger, Isometry Classes of Codes.

Harald Fripertinger, Wnk2: Number of the isometry classes of all binary (n,k)-codes. [See column k=5.]

H. Fripertinger and A. Kerber, Isometry classes of indecomposable linear codes, preprint, 1995. [We have a(n) = W_{n,5,2}; see p. 4 of the preprint.]

H. Fripertinger and A. Kerber, Isometry classes of indecomposable linear codes. In: G. Cohen, M. Giusti, T. Mora (eds), Applied Algebra, Algebraic Algorithms and Error-Correcting Codes, 11th International Symposium, AAECC 1995, Lect. Notes Comp. Sci. 948 (1995), pp. 194-204. [We have a(n) = W_{n,5,2}; see p. 197.]

Petros Hadjicostas, Generating function for a(n).

Crossrefs

Cf. A034253, A034254.

Column k=5 of both A034356 and A076831 (which are the same except for column k=0).

First differences give A034346.

Sequence in context: A054459 A060188 A058751 * A220148 A114245 A220238

Adjacent sequences: A034356 A034357 A034358 * A034360 A034361 A034362

Keyword

nonn

Author

N. J. A. Sloane

Extensions

More terms from Joerg Arndt, Oct 09 2019

Status

approved