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A015496
a(0)=1, a(1)=8, a(n) = sum_{k=0}^{k=n-1} 8^k a(k).
0
1, 8, 65, 4225, 2167425, 8879940225, 290986761233025, 76280724523431338625, 159972350276487602091434625, 2683890834588642498097652544938625, 360225732702402245287553744812732691882625
OFFSET
0,2
FORMULA
a(n) = (8^(n-2) + 1) * a(n-1). - Vincenzo Librandi, Nov 11 2012
PROG
(Magma) I:=[1, 8, 65]; [n le 3 select I[n] else (8^(n-2)+1)*Self(n-1): n in [1..15]]; // Vincenzo Librandi, Nov 11 2012
CROSSREFS
Sequence in context: A041114 A360847 A320990 * A226126 A039329 A230736
KEYWORD
nonn,easy
STATUS
approved