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A131789
The length of the n-th run of identical consecutive values in the sequence A000005, where A000005(k) is the number of divisors of k.
2
1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 1, 1, 3, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 3, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 2, 1
OFFSET
1,2
COMMENTS
The first appearance of 4 is at a(204) and the first appearance of 5 is at a(10317). - Harvey P. Dale, Aug 26 2024
LINKS
EXAMPLE
Runs in A000005: (1), (2,2), (3), (2), (4), (2), (4), (3), (4), (2), (6), (2), (4,4), (5), (2), (6), (2), (6), (4,4), (2), (8), (3), ...
MATHEMATICA
Length/@Split[DivisorSigma[0, Range[150]]] (* Harvey P. Dale, Aug 26 2024 *)
CROSSREFS
Sequence in context: A030575 A350040 A280940 * A108465 A372467 A367419
KEYWORD
nonn,easy
AUTHOR
Leroy Quet, Jul 15 2007
EXTENSIONS
More terms from Joshua Zucker, Jul 18 2007
Name clarified by Jason Kimberley, Jul 18 2018
STATUS
approved