91538

Appears in sequences

• a(n) cannot be prefixed or followed by any digit to form a prime ('empty' prefixes allowed).at n=30A032736
• a(n) cannot be prefixed or followed by any digit to form a prime ('empty' prefixes and suffixes are allowed).at n=20A032738
• Number of permutations of length n which avoid the patterns 1234, 1243, 3421.at n=15A116762
• a(n) is the least positive number k such that n is the greatest m such that k is a quadratic nonresidue mod prime(i+1) for i=1..m and {k mod prime(i+1): i=1..m} are all distinct.at n=10A385051