0,2

Comment from Neven Juric, Apr 20 2008: If we use hexadecimal characters, the sequence can be extended as follows: 1, 3, 9, 23, 69, 183, 509, 1323, 3969, b483, 2a209, 86623, 217669, 64a783, ...

Table of n, a(n) for n=0..8.

Sequence in context: A047045 A164949 A146661 * A196488 A108488 A018334

Adjacent sequences: A004663 A004664 A004665 * A004667 A004668 A004669

nonn,base

N. J. A. Sloane.

approved