http://3cbzkrvakrpetjjppdwzbzqrlkmzatjs7jbyazap5gwutj32gcltjpqd.onion
Gunderson Superimposed codes, take two After my last post on superimposed codes, I discovered that OEIS already had a sequence
for it (I had just missed it due to a slightly different convention),
namely A286874 (and its sister sequence A303977 , which lists the number of distinct
maximal solutions). However, very few terms of this sequence were known;
in particular, it was known that a(12) >= 20 (easily proved by simply
demonstrating a set of twenty 12-bit numbers with the desired...