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A055174 Cumulative counting sequence: method B (noun,adjective)-pairs with first term 2. 4
2, 2, 1, 2, 2, 1, 1, 2, 4, 1, 3, 2, 5, 1, 4, 4, 1, 3, 1, 2, 6, 1, 7, 4, 3, 3, 2, 5, 1, 2, 8, 1, 9, 4, 4, 3, 4, 5, 2, 6, 1, 7, 1, 2, 10, 1, 12, 4, 7, 3, 5, 5, 3, 6, 2, 7, 2, 8, 1, 9, 1, 2, 13, 1, 15, 4, 8, 3, 7, 5, 5, 6, 3, 7, 4, 8, 2, 9, 2, 10, 1, 12, 1, 2, 16, 1, 18 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Segments (generated as at A055168):  2; 2,1; 2,2,1,1; 2,4,1,3,2,5; ...

Conjecture: every positive integer occurs.

LINKS

Table of n, a(n) for n=1..87.

EXAMPLE

Write 2, thus having 2 once, thus having 2 twice and 1 once, thus having 2 4 times and 1 3 times and 2 5 times, etc.

MATHEMATICA

s = {2}; Do[s = Flatten[{s, {#, Count[s, #]} & /@ DeleteDuplicates[s]}], {24}]; s (* Peter J. C. Moses, Mar 21 2013 *)

CROSSREFS

Cf. A055168.

Sequence in context: A192064 A225182 A014710 * A096369 A332289 A102297

Adjacent sequences:  A055171 A055172 A055173 * A055175 A055176 A055177

KEYWORD

nonn

AUTHOR

Clark Kimberling, Apr 27 2000

STATUS

approved

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Last modified June 23 12:00 EDT 2021. Contains 345400 sequences. (Running on oeis4.)