37802domain: NAppears in sequencesa(0) = 1, a(n) = 42*n^2 + 2 for n>0.at n=30A010023a(n) = (n^3 + 4*n^2 - n)/2.at n=40A162260Indices where the cumulative sum of cos(2k+1)^(2k+1) reaches a record high value.at n=5A389559