600250domain: NAppears in sequencesPrimal codes of finite idempotent functions on positive integers.at n=15A109298Expansion of (1 + 14*x)/(1 - 35*x^2).at n=7A182753Twisted variant of A276086 indexed by A328625.at n=49A328624a(n) = A276086(A328623(n)).at n=37A346233