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URL: https://oeis.org/A037840

⇱ A037840 - OEIS

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A037840
a(n)=Sum{|d(i)-d(i-1)|: i=1,...,m}, where Sum{d(i)*8^i: i=0,1,...,m} is the base 8 representation of n.
2
0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 2, 3, 4, 5, 6, 2, 1, 0, 1, 2, 3, 4, 5, 3, 2, 1, 0, 1, 2, 3, 4, 4, 3, 2, 1, 0, 1, 2, 3, 5, 4, 3, 2, 1, 0, 1, 2, 6, 5, 4, 3, 2, 1, 0, 1, 7, 6, 5, 4, 3, 2, 1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 1, 0, 1, 2, 3, 4, 5, 6, 3, 2, 1, 2, 3, 4, 5, 6, 5, 4, 3
OFFSET
1,11
COMMENTS
This is the base-8 total variation sequence; see A297330. - Clark Kimberling, Jan 18 2017
LINKS
MATHEMATICA
b = 8; z = 120; t = Table[Total@ Flatten@ Map[Abs@ Differences@ # &, Partition[IntegerDigits[n, b], 2, 1]], {n, z}] (* cf. Michael De Vlieger, A037834 *)
CROSSREFS
Cf. A297330.
Sequence in context: A255592 A037894 A037902 * A165091 A192514 A105257
KEYWORD
nonn,base
EXTENSIONS
Updated by Clark Kimberling, Jan 20 2018
STATUS
approved