A174831 a(n) is the concatenation of the frequency of 0's, 1's, 2's etc. in the entries a(0) up to a(n-1).

0, 1, 11, 13, 1401, 26011, 3811101, 4121210101, 61622201010001, 1119522020100010001, 1922822120100110001001, 27281122120200110001002001, 37331622120200210001002001000011

Offset: 0

Author

Paolo P. Lava and Giorgio Balzarotti, Mar 30 2010

Keywords

• easy
• nonn
• base

Comments

Like A006920 but starting from a(0)=0.

Examples

			a(2) = 1|1 because there is 1 zero and 1 one in the entries a(0) and a(1).
a(3) = 1|3 because there are 1 zero and 3 ones in the entries a(0) to a(2).
a(7) = 4|12|1|2|1|0|1|0|1 because there are 4 zeros, 12 ones, 1 two, 2 threes, 1 four, 0 fives,..., 1 eight in the entries a(0) to a(6).
		

Links

• Index to sequences related to 'say what you see'

Crossrefs

Cf. A006920, A177359

Extensions

Definition corrected by Paolo P. Lava, Apr 04 2010

Definition rephrased, examples added, keyword:base added - R. J. Mathar, Aug 10 2010