|
%I #5 Mar 30 2012 18:51:59
%S 3,8,5,15,12,24,7,21,35,16,32,48,9,27,45,63,20,40,60,80,11,33,55,77,
%T 99,24,48,72,96,120,13,39,65,91,117,143,28,56,84,112,140,168,15,45,75,
%U 105,135,165,195,32,64,96,128,160,192,224
%N Irregular triangle: A120070 read downwards antidiagonals.
%C The triangle in this rearrangement contains 1, 1, 2, 2, 3, 3, 4, 4,... = floor((n+1)/2) entries in row n.
%C The first differences between terms in row n are A005843(n+2).
%e 3;
%e 8;
%e 5,15;
%e 12,24;
%e 7,21,35;
%e 16,32,48;
%K nonn,easy,tabf
%O 1,1
%A _Paul Curtz_, Aug 31 2008
|
