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Month: April 2012
OEIS A181980: Least positive integer m > 1 such that 1 – m^k + m^(2k) – m^(3k) + m^(4k) is prime, where k = A003592(n)
The sequence: 2, 4, 2, 6, 2, 20, 20, 26, 25, 10, 14, 5, 373, 4, 65, 232, 56, 2, 521, 911, 1156, 1619, 647, 511, 34, 2336, 2123, 1274, 2866, 951, 2199, 1353, 4965, 7396, 13513, 3692, 14103, 32275, 2257, 86, 3928, 2779, 18781, 85835, 820, 16647, 2468, 26677, 1172, 38361, 40842, 1-m^k+m^(2*k)-m^(3^k)+m^(4*k) equals […]