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A121896
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Let M be the matrix defined in A111490. Sequence gives M(1,1), M(1,2)+M(1,2)+M(2,2), M(1,3)+M(2,3)+M(3,1)+M(3,2)+M(3,3), etc.
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1
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1, 4, 8, 14, 20, 30, 37, 51, 61, 76, 89, 111, 120, 146, 165, 187, 205, 239, 255, 293, 312
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