The concatenation of the first four terms' (decimal) digits gives 1210 = A046043(1).
Table of n, a(n) for n=0..78.
Note that we do not need to specify a(0) explicitly. Indeed, a(0) = 1 as it cannot be 0. a(1) = 2 as it cannot be 0 or 1.
Cf. A046043 (Autobiographical numbers), A001462 (Golomb's sequence).
Sequence in context: A052922 A181930 A256797 * A066426 A100887 A073592
Adjacent sequences: A109164 A109165 A109166 * A109168 A109169 A109170
Rick L. Shepherd, Jun 20 2005