1187551domain: NPropertiesPrimalityPrimeyesAppears in sequences"BGJ" (reversible, element, labeled) transform of 1,0,1,0... (odds).at n=15A032050Binomial transform of 0, 1, 1, 7, 7, 31, 31, ..., zero followed by duplicated A083420.at n=13A140420a(n) = (1/4)*(9^n - 2*4^n + 3), n > 0; a(0) = 0.at n=7A386359Prime numbersat n=92043