Additive Squares

Word of length 225 over {0, 2, 4, 9}

by Aayush Rajasekaran, 2026-08-20 · the current record for this alphabet · JSON

050100150200-60-40-200 position in word → partial sum

Display: drawn for the equivalent alphabet translated by -4 (drift removed).

0 2 0 4 0 2 0 9 0 2 0 4 2 0 2 9 4 9 2 9 0 2 4 2 0 9 0 2 4 0 4 9 4 2 4 9 4 0 9 4 9 2 9 4 9 0 9 2 0 2 4 2 0 9 0 2 0 9 4 9 2 9 4 0 4 2 0 4 0 9 4 2 4 0 2 0 9 0 2 0 4 0 2 9 2 4 0 4 2 4 9 4 2 4 0 2 9 2 0 2 4 0 2 9 4 0 9 4 9 2 9 4 0 9 0 2 0 9 0 4 0 2 4 2 9 0 2 4 0 4 9 4 2 4 9 4 0 9 4 9 2 9 4 9 0 9 2 0 9 0 4 9 2 9 4 9 0 4 2 4 0 9 0 2 4 2 9 0 9 4 0 9 0 2 0 4 0 2 0 9 2 0 4 2 4 9 4 0 4 9 4 2 9 4 9 0 2 4 0 2 0 9 2 9 4 9 0 4 0 2 9 4 9 0 9 2 9 0 9 4 0 4 2 0 4

Alphabet {0, 2, 4, 9}

size 4 · diameter 9 · record length 225 · JSON

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

Know the exact maximum? Log in to claim this alphabet closed.

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