71406domain: NAppears in sequencesa(n) is the number of terms in the expansion of (x+y-z)*(x^2+y^2-z^2)*(x^3+y^3-z^3)*...*(x^n+y^n-z^n).at n=26A086817A024581 / [1,2,3,...].at n=12A153582Numbers k such that k, k + 1 and k + 2 have the same number of divisors in Gaussian integers.at n=4A332313