A051637 Chromos with n colors.

1, 2, 3, 7, 10

Offset

2,2

Links

Table of n, a(n) for n=2..6.

T. W. Cusick, P. Stanica, Counting the n-chromos of I.J. Schoenberg, Journal of Combinatorial Theory, Ser. A, Vol. 79, No. 2, pp. 298-314.

P. Stanica, Chromos and covering residue classes, preprint, Dec., 1999.

Example

a(2)=1 because 12 is the only chromo with two colors, a(3)=2 because 123 and 122133 are the only chromos with three colors.

Crossrefs

Sequence in context: A109800 A152136 A059180 * A051471 A140794 A047531

Adjacent sequences: A051634 A051635 A051636 * A051638 A051639 A051640

Keyword

hard,more,nice,nonn

Author

Pantelimon Stanica (pstanica(AT)mail.aum.edu)

Extensions

Next term is >=27.

Status

approved