1047553domain: NAppears in sequencesa(n) = 4^n - 2^n + 1.at n=10A02051512th cyclotomic polynomial evaluated at powers of 2.at n=5A020520a(n) = n^4 - n^2 + 1.at n=32A060886Numbers of the form 2^k+1 or 4^k-2^k+1.at n=29A064386Integers of the form (2^x + 1) / (2^y + 1).at n=27A370425