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A055591 a(n) = a(n-1)+3^a(n-1). 2

%I

%S 0,1,4,85,35917545547686059365808220080151141317128

%N a(n) = a(n-1)+3^a(n-1).

%F a(n) = A055591(n-1)+A055590(n)

%e a(3) = 4+3^4 = 4+81 = 85

%t NestList[#+3^#&,0,4] (* _Harvey P. Dale_, Apr 18 2012 *)

%Y Cf. A034797, A055590.

%K easy,nonn

%O 0,3

%A _Henry Bottomley_, May 26 2000

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Last modified October 15 21:38 EDT 2021. Contains 348034 sequences. (Running on oeis4.)