1,1

It appears that there are just two numbers n for which f(n) = 7, namely 412 and 622 and none with f(n) > 7.

Table of n, a(n) for n=1..26.

Cf. A000292, A104246, A102795, etc.

Sequence in context: A181255 A322542 A323759 * A267556 A268119 A202406

Adjacent sequences: A102802 A102803 A102804 * A102806 A102807 A102808

nonn

Jud McCranie, Feb 26 2005

approved