1,4
Table of n, a(n) for n=1..8.
Cf. A186202.
Sequence in context: A114289 A147597 A048775 * A125193 A002184 A002588
Adjacent sequences: A181948 A181949 A181950 * A181952 A181953 A181954
nonn
Olivier Gérard, Apr 03 2012
approved