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%I #5 Dec 15 2017 17:36:23
%S 1,2,2,4,4,4,5,6,7,8,8,9,9,10,11,14,13,14,15,13,16,18,17,19,18,20,19,
%T 21,23,21,23,24,24,26,26,27,29,28,29,30,31,32,31,33,36,34,36,37,35,40,
%U 37,38,40,40,42,43,43,42,44,47,45,47,46,47,50,48,53,51,53,51,53,53,58,54
%N Write the numbers 1, 2, ... in a triangle with n terms in the n-th row; a(n) = number of deficient integers in n-th row.
%e Triangle begins
%e 1 (1 deficient)
%e 2 3 (2 deficient)
%e 4 5 6 (2 deficient)
%e 7 8 9 10 (4 deficient)
%e 11 12 13 14 15 (4 deficient)
%e 16 17 18 19 20 21 (4 deficient)
%e 22 23 24 25 26 27 28 (5 deficient)
%Y Cf. A005100.
%K easy,nonn
%O 1,2
%A _Jason Earls_, Jun 08 2003
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