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%I #7 Dec 05 2013 19:56:04
%S 1,5,12,25,41,60,85,112,145,180,221,264,313,365,420,481,544,613,684,
%T 761,840,925,1012,1105,1200,1301,1404,1513,1624,1741,1860,1985,2112,
%U 2245,2380,2521,2664,2813,2964,3121,3281,3444,3613,3784,3961,4140,4325,4512
%N Diagonal 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.
%e T(n,k) begins:
%e 1, 2, 7, 6, 18, 15, ...
%e 4, 5, 8, 14, 16, 27, ...
%e 3, 9, 12, 17, 26, 31, ...
%e 13, 11, 19, 25, 32, 42, ...
%e 10, 20, 24, 33, 41, 50, ...
%e 21, 23, 34, 39, 51, 60, ...
%Y Cf. A074135, A082017, A082018, A082002, A082003, A082004, A082005.
%K nonn
%O 1,2
%A _Amarnath Murthy_, Apr 05 2003
%E Edited and more terms from _Alois P. Heinz_, Oct 26 2011
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