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proposed
approved
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editing
proposed
Irregular triangle read by rows: T(n,k) is the number of primitive (period n) periodic palindromes palindromic structures using exactly k different symbols, 1 <= k <= n/2 + 1.
approved
editing
editing
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Andrew Howroyd, <a href="/A285037/b285037_1.txt">Table of n, a(n) for n = 1..2600</a>
proposed
approved
editing
proposed