A177359 a(n) contains the nonzero frequencies f(d) of digits d=0 .. 9 in all terms up to a(n-1) in concatenated form sorted with respect to d: f(0)//0//f(1)//1//...//f(9)//9. Initial term a(1)=0.

0, 10, 2011, 303112, 40512223, 506152331415, 60916253244516, 70111826344654619, 801519273747576171829, 9019111283849586673849, 100231122103104105106777889, 1603011521231141151161079899, 190411172143124135136117108129, 210531202173154145146137118149, 230631232203194175156157128159

Offset: 1

Author

Paolo P. Lava, May 10 2010

Keywords

• easy
• nonn
• base

Comments

Zero; one zero; two zeros, one one; three zeros, three ones, one two; four zeros, five ones, two twos, two threes; five zeros, six ones, five twos, three threes, one four, one five; etc.

Also look left and say. - Robert G. Wilson v, Nov 18 2019

Links

• Robert G. Wilson v, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A060857, A177360, A177361, A177362, A177363, A177364, A177365, A177366, A177367, A177368.

Programs

Mathematica

Nest[Append[#, FromDigits@ Flatten@ Map[IntegerDigits@ Reverse@ # &, Sort@ Tally@ Flatten@ IntegerDigits@ #]] &, {0}, 11] (* Michael De Vlieger, Nov 21 2019 *)

Extensions

More terms from Robert G. Wilson v, Nov 18 2019