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A064991 In A064990, drop leading 0's from A_k (for k>0) and convert to decimal. 1
0, 1, 78, 20487601, 369071811667060977001038, 2157596228176369025492751451130809592490957353466093604326704974092869041 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Next term is about 4.31*10^218.

LINKS

Table of n, a(n) for n=0..5.

FORMULA

a(n+1) = a(n)(4^3^n + 2^3^n - 1) + 2^3^n - 1. - David Wasserman, Aug 20 2002

CROSSREFS

Sequence in context: A159402 A093239 A299713 * A265492 A051326 A033399

Adjacent sequences:  A064988 A064989 A064990 * A064992 A064993 A064994

KEYWORD

nonn,easy,base

AUTHOR

Michael Gilleland (megilleland(AT)yahoo.com), Oct 31 2001

EXTENSIONS

More terms from David Wasserman, Aug 20 2002

STATUS

approved

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Last modified November 20 02:34 EST 2019. Contains 329323 sequences. (Running on oeis4.)