A103369 Number in the 2-digitaddition sequence at which the eventually periodic part starts.

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

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

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

Cf. A007770, A031176, A003132, A039943.

Sequence in context: A061024 A297105 A222517 * A031189 A045555 A297803

Adjacent sequences: A103366 A103367 A103368 * A103370 A103371 A103372

Keyword

nonn,base

Author

Eric W. Weisstein, Feb 02 2005

Status

approved