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A082017
First row of square array T(n,k) with T(1,1) = 1 where antidiagonals are filled alternating upwards and downwards with the smallest number not already used such that the n-th antidiagonal sum is a multiple of n.
3
1, 2, 7, 6, 18, 15, 28, 29, 49, 45, 75, 66, 94, 91, 130, 120, 155, 153, 201, 190, 232, 231, 288, 276, 325, 326, 391, 378, 462, 435, 508, 496, 589, 561, 641, 630, 732, 703, 790, 780, 891, 861, 955, 946, 1066, 1035, 1136, 1128, 1257, 1225, 1333, 1326, 1464, 1431
OFFSET
1,2
EXAMPLE
T(n,k) begins:
1, 2, 7, 6, 18, 15, ...
4, 5, 8, 14, 16, 27, ...
3, 9, 12, 17, 26, 31, ...
13, 11, 19, 25, 32, 42, ...
10, 20, 24, 33, 41, 50, ...
21, 23, 34, 39, 51, 60, ...
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Apr 05 2003
EXTENSIONS
Edited and more terms from Alois P. Heinz, Oct 26 2011
STATUS
approved