%I #3 Mar 30 2012 17:25:33
%S 1,1,0,1,1,0,0,1,2,0,0,0,2,3,0,-1,0,0,3,5,0,-1,0,0,-1,0,0,5,7,0,-1,0,
%T -2,0,0,7,11,0,0,-1,0,-3,0,0,11,15,0,0,0,-2,0,-5,0,0,15,22,0,0,0,0,-3,
%U 0,-7,0,0,22,30,0,0,0,0,0,-5,0,-11,0,0,30,42,0,1,0,0,0,0,-7,0,-15,0,0,42,56
%N Eigentriangle of the partition numbers.
%C Sum of n-th row terms = rightmost nonzero term of next row.
%C Row sums = the partition numbers, A000041, as well as the rightmost diagonal with no zeros.
%F Triangle read by rows, termwise products of A000041 (the partition numbers); and the partition number generator, A145006.
%e First few rows of the triangle =
%e 1;
%e 1, 0;
%e 1, 1, 0;
%e 0, 1, 2, 0;
%e 0, 0, 2, 3, 0;
%e -1, 0, 0, 3, 5, 0;
%e 0, -1, 0, 0, 5, 7, 0;
%e -1, 0, -2, 0, 0, 7, 11, 0,;
%e 0, -1, 0, -3, 0, 0, 11, 15, 0;
%e 0, 0, -2, 0, -5, 0, 0, 15, 22, 0;
%e 0, 0, 0, -3, 0, -7, 0, 0, 22, 30, 0;
%e 0, 0, 0, 0, -5, 0, -11, 0, 0, 30, 42, 0;
%e 1, 0, 0, 0, 0, -7, 0, -15, 0, 0, 42, 56, 0;
%e 0, 1, 0, 0, 0, 0, -11, 0, -22, 0, 0, 56, 77, 0;
%e 0, 0, 2, 0, 0, 0, 0, -15, 0, -30, 0, 0, 77, 101, 0;
%e ...
%e Example: row 4 = (0, 0, 2, 3) = termwise products of (0, 0, 1, 1) and (1, 1, 2, 3), where (0, 0, 1, 1) = row 4 of triangle A145006. The partition numbers = (1, 1, 2, 3, 5, 7, 11, 15,...).
%K eigen,tabl,sign
%O 0,9
%A _Gary W. Adamson_, Sep 28 2008
|