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A171904 Smallest number m such that m and m+n have both at least two identical neighboring digits in their decimal representations. 3

%I

%S 99,110,110,110,110,110,110,110,110,100,11,88,99,99,99,99,99,99,99,99,

%T 112,11,77,88,88,88,88,88,88,88,88,112,11,66,77,77,77,77,77,77,77,77,

%U 112,11,55,66,66,66,66,66,66,66,66,112,11,44,55,55,55,55,55,55,55,55

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

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

%H R. Zumkeller, <a href="/A171904/b171904.txt">Table of n, a(n) for n = 1..10000</a>

%F A196368(a(n)) + A196368(a(n)+n) = 0. - _Reinhard Zumkeller_, Jan 31 2014

%o (Haskell)

%o a171904 n = head [m | m <- a171901_list, a196368 (m + n) == 0]

%o -- _Reinhard Zumkeller_, Jan 31 2014

%Y Cf. A196368, A171901, A171903.

%K base,nonn,look

%O 1,1

%A _Reinhard Zumkeller_, Feb 07 2010

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Last modified April 6 15:23 EDT 2020. Contains 333276 sequences. (Running on oeis4.)