0,2
Vincenzo Librandi, Table of n, a(n) for n = 0..10000
(MAGMA) [(3*n+1)^4: n in [0..30]]; // Vincenzo Librandi, Sep 21 2011
Sequence in context: A205020 A204309 A204303 * A205181 A205277 A205174
Adjacent sequences: A016777 A016778 A016779 * A016781 A016782 A016783
nonn,easy
N. J. A. Sloane (njas(AT)research.att.com).