1,1

a(8) = 757 is the solution to the original puzzle which gave only seven terms.

Table of n, a(n) for n=1..8.

Neopets, Lenny Conundrum #151 (login/registration required).

a(5) = 3*a(1) + 1

a(2) = 3*a(6) + 1

a(3) = 3*a(7) + 1

a(8) = 3*a(4) + 1

So perhaps some pairs were switched in the original puzzle?

Cf. A119568.

Sequence in context: A246135 A140002 A178652 * A142436 A322842 A063645

Adjacent sequences: A119564 A119565 A119566 * A119568 A119569 A119570

dumb,fini,full,nonn

Joshua Zucker, Jun 02 2006

approved