Additive Squares

Word of length 328 over {0, 2, 4, 13}

by Aayush Rajasekaran, 2026-08-26 · the current record for this alphabet · JSON

01002003000 position in word → partial sum

Display: drawn for the equivalent alphabet translated by -5 (drift removed).

0 4 13 2 4 0 2 4 2 13 4 13 0 13 2 0 4 2 13 0 13 2 13 4 13 2 13 0 2 0 4 2 0 2 13 4 2 4 0 4 2 4 13 4 2 0 13 0 4 13 4 2 4 13 4 0 13 4 13 2 13 0 13 2 13 4 2 0 13 4 0 13 0 2 0 13 0 4 0 2 4 13 4 2 0 2 13 0 13 4 13 2 4 13 4 0 4 13 4 2 4 0 2 0 13 0 2 4 13 4 2 4 0 4 2 4 13 2 0 2 4 0 2 0 13 0 2 0 4 2 4 13 4 0 13 4 13 2 13 0 2 0 4 13 4 2 0 4 0 13 0 2 0 13 0 4 13 0 13 2 13 4 13 2 13 0 2 13 4 0 4 13 4 2 13 0 13 2 4 2 0 13 0 4 0 2 4 13 2 0 2 4 0 4 13 4 2 4 13 4 0 13 4 13 2 0 2 4 13 4 0 13 4 13 2 13 4 13 0 13 2 0 13 0 4 13 4 2 0 2 4 2 0 13 0 4 13 4 2 13 4 13 0 13 2 13 0 13 4 0 13 0 2 0 13 0 4 0 2 4 0 4 13 0 2 0 13 0 4 13 2 13 4 13 0 4 13 2 0 2 4 0 4 13 4 2 4 13 4 0 13 4 13 2 13 0 13 2 13 4 2 0 13 0 4 13 0 13 2 13 4 2 0 2 4 2 13 4 2 0 13 0 2 0 4 2 0 2

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Alphabet {0, 2, 4, 13}

size 4 · diameter 13 · record length 328 · JSON

open No exhaustive search has settled this alphabet; the record is a lower bound on the (possibly infinite) maximum.

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