3,2
CRC Handbook of Combinatorial Designs, 1996, p. 649.
Table of n, a(n) for n=3..15.
Even-indexed terms of column k=5 of A319367.
Sequence in context: A180500 A176990 A109928 * A064454 A116662 A024580
Adjacent sequences: A023637 A023638 A023639 * A023641 A023642 A023643
nonn,more
N. J. A. Sloane
approved