A171904 Smallest number m such that m and m+n have both at least two identical neighboring digits in their decimal representations.

99, 110, 110, 110, 110, 110, 110, 110, 110, 100, 11, 88, 99, 99, 99, 99, 99, 99, 99, 99, 112, 11, 77, 88, 88, 88, 88, 88, 88, 88, 88, 112, 11, 66, 77, 77, 77, 77, 77, 77, 77, 77, 112, 11, 55, 66, 66, 66, 66, 66, 66, 66, 66, 112, 11, 44, 55, 55, 55, 55, 55, 55, 55, 55

Offset

1,1

Comments

a(n) + n = A171901(k) for some k.

Links

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

Formula

A196368(a(n)) + A196368(a(n)+n) = 0. - Reinhard Zumkeller, Jan 31 2014

Prog

(Haskell)
a171904 n = head [m | m <- a171901_list, a196368 (m + n) == 0]
-- Reinhard Zumkeller, Jan 31 2014

Crossrefs

Cf. A196368, A171901, A171903.

Sequence in context: A317592 A296881 A243259 * A171903 A072433 A133650

Adjacent sequences: A171901 A171902 A171903 * A171905 A171906 A171907

Keyword

base,nonn,look

Author

Reinhard Zumkeller, Feb 07 2010

Status

approved