A090043 Numbers n such that there exists a block-transitive point-imprimitive 3-design with parameters (k(k-1)/2+1, k, lambda) for some lambda.

27, 29, 39, 83, 139, 167, 263, 370, 510, 615, 1091, 1399, 1819, 1931, 2039, 2491, 2702, 3419, 3723, 4232, 4883, 6299, 7799

Offset

1,1

References

N. D. Tuan, A note on block-transitive point-imprimitive designs, Europ. J. Combin., 24 (2003), 113-119.

Links

Table of n, a(n) for n=1..23.

Crossrefs

Sequence in context: A042510 A157251 A214832 * A030491 A023742 A039562

Adjacent sequences: A090040 A090041 A090042 * A090044 A090045 A090046

Keyword

nonn

Author

N. J. A. Sloane, Jan 19 2004

Status

approved