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%I #3 Nov 23 2010 23:53:35
%S 19,10,9,49,13,36,89,17,72
%N From item 6 of Cooijman's Odds test (see example line for an explanation).
%H Paul Cooijmans, <a href="http://web.archive.org/web/20050302174449/http://members.chello.nl/p.cooijmans/gliaweb/tests/odds.html">Odds</a>.
%e Fill a 3 x 3 matrix line by line from top row at the left with the numbers of the sequence in order:
%e 19 10 9 19 1+9 19-(1+9)
%e 49 13 36 Equivalent to 49 4+9 49-(4+9)
%e 89 17 72 89 8+9 89-(8+9)
%e So second column elements can be obtained as the sum of digits from the first column of numbers. Third column is the difference between the first two ones.
%K nonn,base
%O 1,1
%A Herman Jamke (hermanjamke(AT)fastmail.fm), Sep 19 2006