a(4) is a term of the type concatenation of r+3, r+2, r+1, r where r = 30k.
The remaining terms are too large to display here. a(6) has 432 digits. a(7) has 3024 digits. [From David Wasserman, Apr 29 2009]
Table of n, a(n) for n=1..5.
Sequence in context: A238467 A254322 A327411 * A201621 A057408 A280903
Adjacent sequences: A112361 A112362 A112363 * A112365 A112366 A112367
Amarnath Murthy, Sep 07 2005
More terms from David Wasserman, Apr 29 2009