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A179738 Let x,y be odd numbers and symbol "m<+>k" be defined as in A179382. Consider sequence x<+>y, x<+>(3*(x<+>y)), x<+>(x<+>(3*(x<+>y))), x<+>(3*(x<+>(x<+>(3*(x<+>y)))),... ; a(n) is the smallest period in case x=2*n-1,y=1. 3
1, 2, 3, 1, 4, 8, 2, 4, 8, 4, 2, 2, 1, 4, 12, 4, 2, 26 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..19.

EXAMPLE

Let n=6, 2*n-1=11. We have 11<+>1=3, 11<+>(3*3)=5, 11<+>5=1, 11<+>(3*1)=7, 11<+>7=9, 11<+>(3*9)=19, 11<+>19=15, 11<+>(3*15)=7, 11<+>7=9,... Thus we have eventually periodic sequence with the smallest period 4 (with elements 7,9,19,15). Thus a(6)=4.

CROSSREFS

Cf. A179382 A179480 A179686

Sequence in context: A258579 A263757 A021436 * A187889 A118800 A200139

Adjacent sequences:  A179735 A179736 A179737 * A179739 A179740 A179741

KEYWORD

nonn,uned

AUTHOR

Vladimir Shevelev, Jul 25 2010

STATUS

approved

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Last modified June 19 20:27 EDT 2021. Contains 345145 sequences. (Running on oeis4.)