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A307150
Row 6 of array in A059897.
5
6, 3, 2, 24, 30, 1, 42, 12, 54, 15, 66, 8, 78, 21, 10, 96, 102, 27, 114, 120, 14, 33, 138, 4, 150, 39, 18, 168, 174, 5, 186, 48, 22, 51, 210, 216, 222, 57, 26, 60, 246, 7, 258, 264, 270, 69, 282, 32, 294, 75, 34, 312, 318, 9, 330, 84, 38, 87, 354, 40, 366, 93
OFFSET
1,1
COMMENTS
From Peter Munn, Apr 02 2019: (Start)
Also column 6 of A059897.
A self-inverse permutation of the positive integers with no fixed points; A073675 composed with A120229.
The permutation swaps pairs of integers whose ratio is 1:6 or 2:3, these ratios corresponding to the factorizations 1*6 = 2*3 = 6. Row 6 is the first row of A059897 to exhibit more than 1 such ratio.
(End)
The integers in the pairs with ratio 1:6 are listed in A036668, the integers in the pairs with ratio 2:3 are listed in A325424. - Peter Munn, Mar 05 2020
FORMULA
From Peter Munn, Apr 02 2019: (Start)
a(n) = A059897(6,n) = A059897(n,6).
a(n) = A073675(A120229(n)) = A120229(A073675(n)) = A073675(n) * A120229(n) / n.
(End)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Mar 29 2019
EXTENSIONS
More terms from Alois P. Heinz, Mar 31 2019
STATUS
approved