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A361926
Square array A(n, k) of distinct positive integers, n, k > 0, read and filled by upwards antidiagonals in the greedy way such that A(n, k) is a multiple of A(n, 1).
3
1, 2, 3, 4, 6, 5, 7, 8, 10, 9, 11, 14, 12, 16, 13, 15, 22, 21, 20, 18, 17, 19, 30, 33, 28, 24, 26, 23, 25, 38, 45, 44, 35, 32, 34, 27, 29, 50, 57, 60, 55, 42, 36, 40, 31, 37, 58, 75, 76, 90, 66, 49, 48, 46, 39, 41, 74, 87, 100, 95, 105, 77, 56, 52, 54, 43
OFFSET
1,2
COMMENTS
This sequence is a variant of A361748.
As a flat sequence, this is a permutation of the positive integers with inverse A361940.
EXAMPLE
Array A(n, k) begins:
n\k | 1 2 3 4 5 6 7 8 9 10
----+-----------------------------------------------
1 | 1 3 5 9 13 17 23 27 31 39
2 | 2 6 10 16 18 26 34 40 46 54
3 | 4 8 12 20 24 32 36 48 52 64
4 | 7 14 21 28 35 42 49 56 63 70
5 | 11 22 33 44 55 66 77 88 99 110
6 | 15 30 45 60 90 105 120 135 165 180
7 | 19 38 57 76 95 114 133 152 171 190
8 | 25 50 75 100 125 150 175 200 225 250
9 | 29 58 87 116 145 174 203 232 261 290
10 | 37 74 111 148 185 222 259 296 333 370
PROG
(PARI) See Links section.
CROSSREFS
Cf. A361748, A361940 (inverse).
Sequence in context: A371424 A371425 A361940 * A332805 A332807 A373038
KEYWORD
nonn,tabl
AUTHOR
Rémy Sigrist, Mar 30 2023
STATUS
approved