47503domain: NAppears in sequencesa(n) is the least k such that 4^k mod k = n.at n=32A119678Number of set partitions of [n] with symmetric block size list of length five.at n=7A275290G.f. A(x) satisfies A(x) = 1 - x/A(x) * (1 - A(x) - A(x)^2).at n=20A371888