1,3

Table of n, a(n) for n=1..81.

A. V. Zavarnitsine, Finite simple groups with narrow prime spectrum

a(17)=3 because there are precisely three non-Abelian finite simple groups G (viz. PSL(2,59), A_59, A_60) such that the maximal prime divisor of the order of G is the 17th prime (which is 59).

Cf. A001034

Sequence in context: A135546 A138006 A256557 * A297897 A232076 A099476

Adjacent sequences: A145176 A145177 A145178 * A145180 A145181 A145182

nonn

Andrei V. Zavarnitsine (zav(AT)math.nsc.ru), Oct 03 2008

approved