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Concatenate first n terms of A007770.
0

%I #3 Oct 02 2013 15:47:15

%S 1,17,1710,171013,17101319,1710131923,171013192328,17101319232831,

%T 1710131923283132,171013192328313244,17101319232831324449,

%U 1710131923283132444968,171013192328313244496870

%N Concatenate first n terms of A007770.

%D Shyam Sunder Gupta, Smarandache Sequence of Happy Numbers, Smarandache Notions Journal, Vol. 13 (2002).

%H S. S. Gupta, <a href="http://www.shyamsundergupta.com/shappy.htm">Smarandache Sequences of Happy Numbers</a>

%e a(3)=1710 because 1,7,10 are consecutive terms of A007770 starting from first.

%K easy,base,nonn

%O 1,2

%A _Shyam Sunder Gupta_, Jun 08 2002