A177367 -id:A177367 - cp's OEIS frontend

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

Paolo P. Lava, May 10 2010

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

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

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

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

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

A177368 Count the digits of the previous terms and describe nonzero counts, digits in ascending order, concatenating the count and the digit. Initial term is 9.

Original entry on oeis.org

9, 19, 1129, 311239, 51222349, 615233141559, 91625324451669, 111826344654689, 14192737475762899, 161112839485864738129, 211132103114951065778149, 202911521231341151167788169, 3038119214314413513697108189, 50461202193174145146107138219, 80541232213214165166127148239

Offset: 1

Paolo P. Lava and Giorgio Balzarotti, May 10 2010

For a Mathematica program, see A177360 (you have to slightly modify it) [From Jasper Mulder (jasper.mulder(AT)planet.nl), Jun 04 2010]

			Nine; one nine; 1129=one one, two nines; 311239=three ones, one two, three nines; 51222349=five ones, two twos, two threes, four nines; six ones, five twos, three threes, one four, one five, five nines; etc.

J. Mulder, Table of n, a(n) for n = 1..25000

Cf. A060857, A177359 - A177367

Terms corrected using values in b-file. - N. J. A. Sloane, Oct 05 2010

cp's OEIS Frontend

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.

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