login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A043557
Number of runs in base-5 representation of n.
2
1, 1, 1, 1, 1, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 3, 3, 3, 3, 2, 1, 2, 2, 2, 3, 3, 2, 3, 3, 3, 3, 3, 2, 3, 3, 3, 3, 3, 2, 2, 3, 3, 3, 3, 3, 2, 3, 3, 3, 2, 2, 1, 2, 2, 3, 3, 3, 2, 3, 3, 3, 3, 3, 2, 2, 3, 3, 3, 3, 3, 2, 3, 3, 3, 3, 3, 2, 3, 3
OFFSET
0,6
EXAMPLE
Every positive integers occurs infinitely many times. See A297770 for a guide to related sequences.
MATHEMATICA
b = 5; s[n_] := Length[Split[IntegerDigits[n, b]]];
Table[s[n], {n, 1, 200}]
CROSSREFS
Cf. A297773 (number of distinct runs), A297770.
Sequence in context: A098396 A297773 A043532 * A055027 A214574 A342510
KEYWORD
nonn,base
EXTENSIONS
Updated by Clark Kimberling, Feb 03 2018
STATUS
approved