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Search: id:A039990
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A039990 k th digit of a(n) is the number of different digits within 4 of k (not including k). +0
1
111, 122, 212, 221, 1111, 1222, 2122, 2212, 2221, 11111, 12222, 21222, 22122, 22212, 22221, 111111, 122221, 212222, 221222, 222122, 222212 (list; graph; listen)
OFFSET

0,1
CROSSREFS

Sequence in context: A133794 A104155 A133786 this_sequence A034840 A135643 A070798

Adjacent sequences: A039987 A039988 A039989 this_sequence A039991 A039992 A039993

KEYWORD

base,easy,nonn

AUTHOR

Erich Friedman (erich.friedman(AT)stetson.edu)

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

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