1,2

Comment from Don Reble, Apr 05 2010: This appears to be a finite sequence. It's straightforward to show that a(377)=40876617, and that there are no more terms below 41583755582761723342524882185. After that, I'm stuck.

Table of n, a(n) for n=1..58.

6 is here because 3+3 doesn't count (not all distinct); 5+1 doesn't count (zero exponent).

2271 is not a member because 2271 = 3^1+3^2+3^3+3^4+3^5+3^6 + 5^1+5^2+5^3+5^4 + 7^1+7^2+7^3

Cf. A174656.

Sequence in context: A292924 A015903 A224860 * A171865 A068059 A108868

Adjacent sequences: A078195 A078196 A078197 * A078199 A078200 A078201

nonn

Wouter Meeussen, Mar 20 2010

Edited by Don Reble, Apr 05 2010

approved