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A057791
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Sum[k^(n-k)], where sum is over positive integers, k, where k <= n and GCD(k,n) = 1.
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0
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1, 1, 3, 4, 22, 6, 209, 376, 1835, 2540, 49863, 94944, 1151914, 2190666, 12079274, 95722288, 1150653920, 3217888350, 47454745803, 130819911320, 846278385786, 8064305838350, 126356632390297, 288019285668096, 6861189820377586
(list; graph; refs; listen; history; internal format)
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