A037909 Number of i such that |d(i) - d(i-1)| = 1, where Sum_{i=0..m} d(i)*6^i is the base-6 representation of n.

0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 2, 1, 1, 1, 1, 1, 0, 1, 0, 0, 0, 1, 2, 1, 2, 1, 1, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 2, 1, 2, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1

Offset

1,37

Links

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

Prog

(PARI) a(n) = my(c); for(i=2, #n=digits(n, 6), if(abs(n[i]-n[i-1])==1, c++)); c \\ Iain Fox, Oct 27 2018

Crossrefs

In base b: A037906 (b=3), A037907 (b=4), A037908 (b=5), A037910 (b=7), A037911 (b=8), A037912 (b=9), A037913 (b=10).

Sequence in context: A168509 A347822 A079635 * A181506 A319797 A169987

Adjacent sequences: A037906 A037907 A037908 * A037910 A037911 A037912

Keyword

nonn,base

Author

Clark Kimberling

Status

approved