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A368301
Main diagonal of A365991: the n-th term in the trajectory of n under the A185452 map.
4
1, 1, 4, 3, 208, 1, 73, 2, 573, 13, 183, 1, 52, 3583, 4, 3, 108, 6999, 2, 83, 4974, 13998, 34177, 3, 378, 208, 108, 34177, 417208, 8, 903, 3, 52, 27, 213608, 104302, 1296224, 8, 68933, 13, 11253583, 1158333, 43, 65189, 30792, 9947104, 40507, 2, 6573998, 27573
OFFSET
1,3
LINKS
Alex V. Kontorovich and Jeffrey C. Lagarias, Stochastic Models for the 3x+1 and 5x+1 Problems, arXiv:0910.1944 [math.NT], 2009, and in Jeffrey C. Lagarias, ed., The Ultimate Challenge: The 3x+1 Problem, American Mathematical Society, 2010, pp. 131-188.
FORMULA
a(n) = A365991(n,n-1).
MATHEMATICA
A368301[n_]:=Nest[If[OddQ[#], (5#+1)/2, #/2]&, n, n-1]; Array[A368301, 100]
CROSSREFS
Cf. A185452, A365991, A368300, A371691 (parity).
Sequence in context: A079324 A002298 A195565 * A356855 A335913 A340667
KEYWORD
nonn,easy
AUTHOR
Paolo Xausa, Dec 20 2023
STATUS
approved