A006920 At each step, record how many 1's, 2's, etc. have been seen so far in the sequence. (Formerly M2126)

1, 1, 2, 21, 32, 331, 433, 4351, 53621, 647221, 7673221, 8883233, 891132333, 8101532334101, 101118423351110001, 141220533351220001001, 17142355335122101100101, 23162558335122102101101001, 30192751033612210211110100201, 3823295114361321021111110020101001

Offset

1,3

References

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Links

Table of n, a(n) for n=1..20.

Crossrefs

A333867 is the tabular version of this sequence.

Sequence in context: A294377 A071761 A101316 * A355710 A089558 A266873

Adjacent sequences: A006917 A006918 A006919 * A006921 A006922 A006923

Keyword

nonn,base

Author

N. J. A. Sloane, James Propp

Extensions

More terms from Franklin T. Adams-Watters, Dec 14 2006

Status

approved