Length 139 over {0, 1, 3, 7} — Additive Squares

Word of length 139 over {0, 1, 3, 7}

by Aayush Rajasekaran, 2026-08-20 · JSON

This is a historical record from 2026-08-20, superseded on 2026-08-30 by length 141 — jump to the current record (141).

Display: drawn for the equivalent alphabet translated by -3 (drift removed).

1 0 7 0 3 7 0 7 1 0 7 0 3 7 3 1 7 0 7 3 0 7 0 1 0 3 1 0 1 7 3 0 7 0 1 7 1 3 1 7 1 0 7 1 7 3 7 0 7 3 7 1 3 0 7 3 1 7 1 0 1 7 3 1 3 0 1 3 7 0 1 7 0 7 3 1 3 7 0 3 0 1 0 7 0 1 0 3 1 0 1 7 1 3 1 0 3 1 3 7 3 1 3 0 1 0 7 1 7 3 7 1 7 0 7 3 0 7 0 1 7 1 3 0 1 0 7 0 3 0 7 0 1 7 0 7 3 7 1

Alphabet {0, 1, 3, 7}

size 4 · diameter 7 · record length 141 · 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.

Record history

141 (was 139) — Aayush Rajasekaran, 2026-08-30
139 (was 106) — Aayush Rajasekaran, 2026-08-20
106 (first) — David Renshaw, 2026-08-18

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