0,3

Table of n, a(n) for n=0..54.

Set partition number 3 is {1,2}, 12 in base 3 is 5, so a(3) = 5.

Cf. A000110 (row lengths), A120698, A120695.

Sequence in context: A151499 A057781 A081713 * A135964 A099578 A109452

Adjacent sequences: A120694 A120695 A120696 * A120698 A120699 A120700

base,nonn,tabf

Franklin T. Adams-Watters, Jun 28 2006

approved