OFFSET
1,1
COMMENTS
Segments (generated as at A217760): 2; 1,2; 2,2,1,1; 4,2,3,1; 5,2,4,1,1,4,1,3; ... The 4th segment is read "4 2's and 3 1's" as a record of what was previously written; 4,2 are adjectives and 2 1 are nouns. Conjecture: every nonnegative integer occurs. - Clark Kimberling, Mar 25 2013
LINKS
Seiichi Manyama, Table of n, a(n) for n = 1..10000
EXAMPLE
Write 2, thus having 1 2, thus having 2 2's and 1 1, thus having 4 2's and 3 1's, etc.
MATHEMATICA
s = {2}; Do[s = Flatten[{s, {Count[s, #], #} & /@ DeleteDuplicates[s]}], {14}]; s (* Peter J. C. Moses, Mar 21 2013 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Apr 27 2000
STATUS
approved