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Single Curio View: (Seek other curios for this number) The smallest prime number that is not the sum of two Ulam numbers. The (standard) Ulam numbers start with 1 and 2; then the subsequent terms are the smallest numbers that can be expressed in just one way as the sum of two distinct earlier terms. The sequence begins 1, 2, 3, 4, 6, 8, 11, 13, .... [Guy]
Submitted: 19990902 18:40:00; Last Modified: 20090114 20:16:43.
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