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A043561
Number of runs in base-9 representation of n.
2
1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 3, 3, 3, 3, 3, 3, 3, 3
OFFSET
0,10
COMMENTS
Every positive integers occurs infinitely many times. See A297770 for a guide to related sequences.
MATHEMATICA
b = 9; s[n_] := Length[Split[IntegerDigits[n, b]]];
Table[s[n], {n, 1, 200}]
CROSSREFS
Cf. A297777 (number of distinct runs), A297770.
Sequence in context: A111626 A297777 A043536 * A297778 A043562 A043537
KEYWORD
nonn,base
EXTENSIONS
Updated by Clark Kimberling, Feb 04 2018
STATUS
approved