1,2

Table of n, a(n) for n=1..52.

7 = 7 or 2+5, so 7 is not in the sequence.

Sequence in context: A054265 A105409 A109934 * A012896 A013078 A106286

Adjacent sequences: A068318 A068319 A068320 * A068322 A068323 A068324

easy,nonn

Naohiro Nomoto, Feb 27 2002

approved