258482

Appears in sequences

• For n>0, a(n) is the least quasi-Carmichael number to base -n, extended to n=0 with the least composite squarefree integer.at n=18A029591
• Number of binary strings of length n with equal numbers of 00110 and 01001 substrings.at n=19A164251
• a(n) = smallest k having at least four prime divisors d such that (d + n) | (k + n).at n=17A202159
• Even Quasi-Carmichael numbers.at n=13A262252