The nonexistence of solutions with maximum matrix element < 94 was proved by exhaustive search.
Table of n, a(n) for n=1..9.
Cf. A088021, A098072, A301372, A301757, A316602.
Sequence in context: A185448 A114250 A249994 * A178747 A071245 A297744
Adjacent sequences: A316598 A316599 A316600 * A316602 A316603 A316604
Hugo Pfoertner, Jul 13 2018