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%I #13 May 03 2017 17:33:47
%S 1,1,2,1,1,2,3,2,1,1,2,3,2,1,1,2,3,4,3,2,1,1,2,3,2,1,1,2,3,4,3,2,1,1,
%T 2,3,2,1,1,2,3,4,3,2,1,1,2,3,2,1,1,2,3,4,5,4,3,2,1,1,2,3,2,1,1,2,3,4,
%U 3,2,1,1,2,3,2,1,1,2,3,4,3,2,1,1,2,3,2,1,1,2,3,4,5,4,3,2,1
%N A285200 displayed as an irregular triangle read by rows.
%C This is Ken Knowlton's elevator sequence A285200, but with an extra 1 each time the elevator returns to (or starts at) the first floor.
%C Row lengths are A285204. The row maxima are given in A285203 (for n>0).
%e Triangle begins:
%e 1,
%e 1, 2, 1,
%e 1, 2, 3, 2, 1,
%e 1, 2, 3, 2, 1,
%e 1, 2, 3, 4, 3, 2, 1,
%e 1, 2, 3, 2, 1,
%e 1, 2, 3, 4, 3, 2, 1,
%e 1, 2, 3, 2, 1,
%e 1, 2, 3, 4, 3, 2, 1,
%e 1, 2, 3, 2, 1,
%e 1, 2, 3, 4, 5, 4, 3, 2, 1,
%e ...
%Y Cf. A285200, A285201, A285203, A285204.
%K nonn,tabf
%O 0,3
%A _N. J. A. Sloane_, May 03 2017
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