A114883 - OEIS

A114883

Obtained from A114882 by deleting row 1 and dividing by 2.

1, 2, 4, 3, 12, 7, 5, 24, 17, 10, 6, 60, 38, 27, 13, 8, 84, 71, 45, 32, 16, 9, 144, 110, 93, 59, 42, 19, 11, 180, 161, 123, 104, 66, 47, 22, 14, 264, 218, 195, 149, 126, 80, 57, 28

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OFFSET

1,2

COMMENTS

A permutation of the natural numbers. Row 1 consists of those congruent to 1 mod 3. (One can then delete row 1 of A114883, leaving only numbers congruent to 0 or 2 mod 3 and then replace each by its rank, thus obtaining another permutation of the natural numbers.)

Also numbers from the array A083140, without the first row, minus 1 divided by 2.

LINKS

Table of n, a(n) for n=1..45.

EXAMPLE

Start with the northwest corner of A114881:

1 3 5 7 9

2 8 14 20 26

4 24 34 54 64

6 48 76 90 118

Delete row 1, leaving all the even positive integers; divide them by 2:

1 4 7 10 13

2 12 17 27 32