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A347264
Largest value in the 3x+1 sequence starting at n, divided by 4.
0
1, 1, 4, 1, 4, 4, 13, 2, 13, 4, 13, 4, 10, 13, 40, 4, 13, 13, 22, 5, 16, 13, 40, 6, 22, 10, 2308, 13, 22, 40, 2308, 8, 25, 13, 40, 13, 28, 22, 76, 10, 2308, 16, 49, 13, 34, 40, 2308, 12, 37, 22, 58, 13, 40, 2308, 2308, 14, 49, 22, 76, 40, 46, 2308, 2308, 16, 49, 25
OFFSET
1,3
COMMENTS
a(n) is the largest value in the n-th row of A347270 divided by 4.
FORMULA
a(n) = A056959(n)/4.
EXAMPLE
For n = 1 the 3x+1 sequence starting in 1 is 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, ... The largest value is 4 and 4/4 = 1 so a(1) = 1.
For n = 7 the 3x+1 sequence starting in 7 is 7, 22, 11, 34, 17, 52, 26, 13, 40, 20, 10, 5, 16, 8, 4, 2, 1, 4, 2, 1, ... The largest value is 52 and 52/4 = 13 so a(7) = 13.
CROSSREFS
[1, 1] together with A328147 (essentially the same sequence).
Sequence in context: A204714 A341100 A350639 * A328147 A151783 A258853
KEYWORD
nonn
AUTHOR
Omar E. Pol, Aug 27 2021
STATUS
approved