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A171903
Numbers m such that m and m+1 have at least two identical neighboring digits in their decimal representations.
4
99, 110, 111, 112, 113, 114, 115, 116, 117, 118, 199, 220, 221, 222, 223, 224, 225, 226, 227, 228, 299, 330, 331, 332, 333, 334, 335, 336, 337, 338, 399, 440, 441, 442, 443, 444, 445, 446, 447, 448, 499, 550, 551, 552, 553, 554, 555, 556, 557, 558, 599, 660
OFFSET
1,1
COMMENTS
a(n) + 1 = A171901(k) for some k;
A171902(a(n)) = 1.
LINKS
FORMULA
A196368(a(n)) + A196368(a(n)+1) = 0. - Reinhard Zumkeller, Jan 31 2014
PROG
(Haskell)
import Data.List (elemIndices)
a171903 n = a171903_list !! (n-1)
a171903_list = elemIndices 0 $
zipWith (+) a196368_list $ tail a196368_list
-- Reinhard Zumkeller, Jan 31 2014
CROSSREFS
KEYWORD
base,nonn,look
AUTHOR
Reinhard Zumkeller, Feb 07 2010
STATUS
approved