References to A073879

a(1) = 1, a(n) = smallest number not included earlier such that a(1)+...+a(n) is a palindrome.
1, 2, 3, 5, 11, 22, 33, 24, 10, 20, 30, 41, 40, 50, 21, 60, 31, 70, 51, 81, 80, 61, 71, 91

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