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A037912 Number of i such that |d(i) - d(i-1)| = 1, where Sum_{i=0..m} d(i)*9^i is the base-9 representation of n. 8
0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,82

LINKS

Iain Fox, Table of n, a(n) for n = 1..10000

PROG

(PARI) a(n) = my(c); for(i=2, #n=digits(n, 9), if(abs(n[i]-n[i-1])==1, c++)); c

CROSSREFS

In base b: A037906 (b=3), A037907 (b=4), A037908 (b=5), A037909 (b=6), A037910 (b=7), A037911 (b=8), A037913 (b=10).

Sequence in context: A037911 A176046 A172090 * A056980 A268643 A005094

Adjacent sequences:  A037909 A037910 A037911 * A037913 A037914 A037915

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified June 2 11:20 EDT 2020. Contains 334771 sequences. (Running on oeis4.)