From a question raised by Tanya Khovanova.
1771561 = 11^6 is the first composite number here. - T. D. Noe, Sep 29 2011
Table of n, a(n) for n=1..5.
Sequence in context: A176117 A078748 A051131 * A101341 A079014 A215436
Adjacent sequences: A119745 A119746 A119747 * A119749 A119750 A119751
David W. Wilson, Jul 30 2006
1771561 from Max Alekseyev, Jul 31 2006