1,2

a(n) = 0 if n is not a term of A002473 (i.e., not a highly composite number).

a(n) = 0 if n = 10k.

Conjecture: otherwise, a(n) is positive.

Sequence may be redefined to avoid large number of zeros by restricting it to members of A002473 which are not divisible by 10.

Table of n, a(n) for n=1..80.

Sequence in context: A297232 A093691 A004176 * A252648 A054054 A115353

Adjacent sequences: A085121 A085122 A085123 * A085125 A085126 A085127

base,nonn

Amarnath Murthy, Jul 06 2003

More terms from David Wasserman, Jan 27 2005

Comments edited by Jon E. Schoenfield, Mar 30 2014

approved