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%I #22 Nov 30 2016 01:03:25
%S 1,3,4,6,6,8,10,11,13,14,16,18,18,20,20,22,22,24,26,26,27,29,30,32,35,
%T 35,38,40,40,41,43,43,43,43,47,47,47,52,53,53,54,56,58,58,60,60,60,62,
%U 64,64,67,67,68,73,74,74,74,74,77,78,78,79,80,87,87,87,87
%N Total number of distinct numbers in the first n antidiagonals of infinite Sudoku-type array A269526.
%C a(n) is also the total number of distinct numbers in the first n antidiagonals of the square array A274528.
%H Alois P. Heinz, <a href="/A274529/b274529.txt">Table of n, a(n) for n = 1..1000</a>
%e For n = 3, the first three antidiagonals of the square array A269526 are [1], [3, 2], [2, 4, 3]. The first four positive integers are in the list, so a(3) = 4.
%Y Cf. A269526, A274528, A274530.
%Y Row lengths of A274534.
%Y A275883 is closely related but a different sequence.
%K nonn
%O 1,2
%A _Omar E. Pol_, Jun 30 2016
%E More terms from _Alois P. Heinz_, Jun 30 2016
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