Best Known (20, s)-Sequences in Base 5
(20, 42)-Sequence over F5 — Constructive and digital
Digital (20, 42)-sequence over F5, using
- t-expansion [i] based on digital (18, 42)-sequence over F5, using
- Niederreiter–Xing sequence construction III based on the algebraic function field F/F5 with g(F) = 17, N(F) = 42, and 1 place with degree 2 [i] based on function field F/F5 with g(F) = 17 and N(F) ≥ 42, using an explicitly constructive algebraic function field [i]
(20, 44)-Sequence over F5 — Digital
Digital (20, 44)-sequence over F5, using
- t-expansion [i] based on digital (19, 44)-sequence over F5, using
- Niederreiter–Xing sequence construction II/III [i] based on function field F/F5 with g(F) = 19 and N(F) ≥ 45, using
(20, 93)-Sequence in Base 5 — Upper bound on s
There is no (20, 94)-sequence in base 5, because
- net from sequence [i] would yield (20, m, 95)-net in base 5 for arbitrarily large m, but
- m-reduction [i] would yield (20, 281, 95)-net in base 5, but
- extracting embedded OOA [i] would yield OOA(5281, 95, S5, 3, 261), but
- the (dual) Plotkin bound for OOAs shows that M ≥ 4 504112 890784 525303 371583 151787 727847 532332 133580 294973 788106 761215 637819 628193 185165 565648 995788 215542 125035 645294 759063 345617 996739 121292 201506 081179 270403 296033 276063 781158 882193 267345 428466 796875 / 131 > 5281 [i]
- extracting embedded OOA [i] would yield OOA(5281, 95, S5, 3, 261), but
- m-reduction [i] would yield (20, 281, 95)-net in base 5, but