1,1
Shyam Sunder Gupta, Smarandache Sequence of Happy Numbers, Smarandache Notions Journal, Vol. 13, 2002).
Table of n, a(n) for n=1..5.
a(1)=71 because in A071827 71 is the first prime.
Cf. A071827.
Sequence in context: A243686 A131454 A099684 * A144242 A144360 A230378
Adjacent sequences: A078912 A078913 A078914 * A078916 A078917 A078918
nonn
Shyam Sunder Gupta, Jan 11 2003
Next three terms in the sequence have 72, 857 and 1309 digits respectively.
approved
