1,3

Geoffrey H. Morley, Table of n, a(n) for n = 1..10000

J. C. Lagarias, The set of rational cycles for the 3x+1 problem, Acta Arith. 56 (1990), 33-53. - See Table 3.1 on page 41.

Cf. A102284, A007310, A226633.

Sequence in context: A100615 A293897 A222119 * A035316 A293718 A068316

Adjacent sequences: A102277 A102278 A102279 * A102281 A102282 A102283

nonn

N. J. A. Sloane, Feb 19 2005

a(12)[k=35] and a(25)[k=73] corrected and more terms added by Geoffrey H. Morley, Mar 14 2013

approved