36364domain: NAppears in sequencesExpansion of cos(log(1 + sin(x))).at n=10A009019a(n) = n^2 concatenated with reverse(n^2) divided by 11.at n=20A084009Numbers k such that k*(k+2) gives the concatenation of a number m with itself.at n=9A116286Eigentriangle, row sums = A144251 shifted, right border = A144251.at n=41A144252