109312domain: NAppears in sequencesFirst occurrence of exactly n 1's in the binary expansion of sqrt(2).at n=15A084186Triangle related to exp(x)*sec(2*x).at n=38A117436Positions of records in A375202.at n=24A375203Triangle read by rows: T(n, k) = n^k * n! * [x^k][y^n]((sec(y) + tan(y)) * exp(x*y)).at n=38A376878