2863311533domain: NAppears in sequencesa(n) = (7 - 4*(-2)^n)/3.at n=31A083594Partial sums of A130707.at n=32A130759Jacobsthal numbers A001045 incremented by 2.at n=33A153643First differences of A135351.at n=35A155980a(n) = (2*2^n+7*(-1)^n)/3.at n=32A171382a(n) = (2*4^n + 7)/3.at n=16A321358