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A103369
Number in the 2-digitaddition sequence at which the eventually periodic part starts.
4
1, 4, 37, 4, 89, 89, 1, 89, 37, 1, 4, 89, 1, 89, 16, 16, 89, 37, 1, 20, 89, 89, 1, 20, 89, 16, 89, 1, 89, 37, 1, 1, 37, 89, 89, 89, 37, 58, 37, 16, 89, 42, 89, 1, 89, 89, 37, 89, 1, 89, 16, 89, 89, 89, 89, 37, 37, 58, 37, 89, 37, 16, 89, 89, 37, 89, 89, 1, 16, 1, 89, 89, 58
OFFSET
1,2
COMMENTS
a(A007770(n)) = 1; a(A031177(n)) > 1. - Reinhard Zumkeller, Mar 16 2013
LINKS
Eric Weisstein's World of Mathematics, Digitaddition
EXAMPLE
The 2-digitaddition sequence for n = 3 is {3, 9, 81, 65, 61, 37, 58, 89, 145, 42, 20, 4, 16, 37, ...}, so a(3) = 37.
PROG
(Haskell)
a103369 = until (`elem` a039943_list) a003132
a103369_list = map a103369 [1..]
-- Reinhard Zumkeller, Oct 17 2011, Aug 24 2011
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Eric W. Weisstein, Feb 02 2005
STATUS
approved