259648domain: NAppears in sequencesNumbers n such that n+k-1 is the sum of two nonzero squares in exactly k ways for all k = 1, 2, 3.at n=9A273318Number of circular ternary words of length n having the maximum possible number of distinct blocks of length floor(log_3 n) and floor(log_3 n)+1.at n=20A330307