A171902 First differences of consecutive numbers having at least two identical neighboring digits in decimal representation.

11, 11, 11, 11, 11, 11, 11, 11, 1, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 11, 11, 11, 11, 11, 11, 11, 1, 11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 11, 11, 11, 11, 11, 11, 1, 11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 11, 11, 11, 11, 11, 1, 11, 11, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 6, 11, 11, 11, 11, 1, 11

Offset

1,1

Comments

a(n) = A171901(n+1) - A171901(n);

1 <= a(n) <= 11;

a(A171903(n)) = 1.

Links

R. Zumkeller, Table of n, a(n) for n = 1..10000

Crossrefs

Sequence in context: A212541 A087994 A100755 * A337241 A045538 A084066

Adjacent sequences: A171899 A171900 A171901 * A171903 A171904 A171905

Keyword

nonn,base

Author

Reinhard Zumkeller, Feb 07 2010

Status

approved