1,1

Duplicate numbers in A009111. The number 210 appears twice; 840 appears three times; 341880 appears four times. See A055193 for the sequence - T. D. Noe, Oct 14 2013

Giovanni Resta, Table of n, a(n) for n = 1..10000

Cf. A009111.

Sequence in context: A236432 A118279 A163263 * A158559 A235248 A235241

Adjacent sequences: A009124 A009125 A009126 * A009128 A009129 A009130

nonn

David W. Wilson

approved