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A045888 Number of distinct odd numbers visible as proper substrings of n. +0
1
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 2, 1, 1, 1, 2, 1, 2, 1, 2, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 2, 1, 2, 1, 1, 1, 2, 1, 2, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 2, 1, 2, 1, 2, 1, 1, 1, 2, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 1, 1, 1, 1, 2, 1, 2 (list; graph; listen)
OFFSET

1,13

EXAMPLE

The first nonzero entry is a(10)=1 since we can see 1 as a proper substring of 10; a(132)=3 because we can see 1,3,13.

CROSSREFS

Sequence in context: A107450 A069349 A062754 this_sequence A107279 A078461 A111621

Adjacent sequences: A045885 A045886 A045887 this_sequence A045889 A045890 A045891

KEYWORD

base,easy,nonn,nice

AUTHOR

Felice Russo (felice.russo(AT)katamail.com)

EXTENSIONS

More terms from Larry Reeves (larryr(AT)acm.org), Sep 28 2000

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Last modified July 8 18:40 EDT 2008. Contains 141013 sequences.


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