417197domain: NAppears in sequencesTriangle read by rows. T(n,k) is the number of flags in an n dimensional vector space over GF(2) that have length exactly k, n >= 0, 0 <= k <= n.at n=38A289546Successive approximations up to 2^n for the 2-adic integer 17^(1/4). This is the 1 (mod 4) case.at n=17A341751