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A137672 Number of ones in binary representation of A137671(n). 3
1, 1, 1, 2, 1, 1, 2, 1, 2, 2, 1, 3, 1, 1, 2, 2, 2, 3, 1, 2, 1, 3, 2, 2, 2, 3, 1, 2, 2, 3, 2, 3, 2, 4, 1, 3, 3, 1, 3, 2, 1, 4, 1, 1, 2, 2, 2, 3, 2, 2, 3, 3, 2, 3, 3, 3, 4, 2, 4, 1, 2, 2, 3, 1, 3, 2, 3, 2, 4, 2, 3, 3, 2, 4, 2, 4, 3, 3, 3, 4, 1, 2, 5, 1, 3, 2, 1, 3, 3, 3, 4, 2, 2, 2, 3, 3, 4, 2, 2, 3, 4, 3, 5, 1, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
LINKS
FORMULA
a(n) = A000120(A137671(n)).
a(A137674(n)) = 1.
a(A137674(n)-1) = n-1.
MATHEMATICA
b[1] = 1; b[n_] := b[n] = Count[Array[a, n-1], a[n-1]]; a[n_] := a[n] = DigitCount[b[n], 2, 1]; Array[a, 100] (* Amiram Eldar, Jul 27 2023 *)
CROSSREFS
Sequence in context: A296977 A025878 A143421 * A141272 A281527 A124038
KEYWORD
nonn,base
AUTHOR
Reinhard Zumkeller, Feb 05 2008
STATUS
approved

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Last modified March 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)