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A144911
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Triangle read by rows: rad(n) along left edge (n, 1) and core(n) along right edge (n, n), with (n, k) = core((n - 1, k - 1) + (n - 1, k)) for 1 < k < n when n > 2.
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0
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1, 2, 2, 3, 1, 3, 2, 1, 1, 1, 5, 3, 2, 2, 5, 6, 2, 5, 1, 7, 6, 7, 2, 7, 6, 2, 13, 7, 2, 1, 1, 13, 2, 15, 5, 2, 3, 3, 2, 14, 15, 17, 5, 7, 1, 10, 6, 5, 1, 29, 2, 22, 3, 2, 10, 11, 1, 11, 6, 30, 31, 6, 1, 5, 3, 11, 6, 3, 3, 17, 1, 61, 37, 7, 6, 2, 14, 3, 13, 1, 6, 5, 2, 62, 2, 11, 13, 2, 1, 17, 13
(list; table; graph; refs; listen; history; internal format)
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