A037220 Summarize the previous term!.

0, 10, 1011, 1031, 102113, 10311213, 10411223, 1031221314, 1041222314, 1031321324, 1031223314, 1031223314, 1031223314, 1031223314, 1031223314, 1031223314, 1031223314, 1031223314, 1031223314, 1031223314, 1031223314

Offset

0,2

Links

Table of n, a(n) for n=0..20.

Example

a(0) is given as 0;
a(1) is one zero -> 10;
a(2) is one zero and one one -> 1011;
a(3) is one zero and three ones -> 1031;
a(7) and onward is 1031223314.

Mathematica

NestList[ FromDigits@ Flatten@ Map[IntegerDigits@ Reverse@# &, Sort@ Tally@ Flatten@ IntegerDigits@#] &, 0, 20] (* Robert G. Wilson v, Nov 28 2019, adapted from code by Michael De Vlieger in A177359 *)

Crossrefs

Cf. A005151.

Sequence in context: A274069 A325493 A006937 * A179284 A138484 A022506

Adjacent sequences: A037217 A037218 A037219 * A037221 A037222 A037223

Keyword

nonn,base,easy

Author

N. J. A. Sloane

Status

approved