A176748 a(n)=a(n-1)^3-a(n-2) with a(1)=1, a(2)=2

1, 2, 7, 341, 39651814, 62343213007067363340803, 242307882727623698206171607564035372782206955665032728479504584309813

Offset

1,2

Comments

The next term -- a(8) -- has 206 digits. [From Harvey P. Dale, Mar 16 2012]

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..9

Mathematica

RecurrenceTable[{a[1]==1, a[2]==2, a[n]==a[n-1]^3-a[n-2]}, a, {n, 8}] (* Harvey P. Dale, Mar 16 2012 *)

Prog

(Magma) I:=[1, 2]; [n le 2 select I[n] else Self(n-1)^3-Self(n-2): n in [1..7]]; // Vincenzo Librandi, Jul 15 2012

Crossrefs

Sequence in context: A144787 A118910 A081505 * A262088 A110386 A260229

Adjacent sequences: A176745 A176746 A176747 * A176749 A176750 A176751

Keyword

nonn

Author

Vincenzo Librandi, Apr 26 2010

Status

approved