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A067234
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Numbers n such that phi(4n+1) = sigma(n).
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1
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56, 476, 2840, 4676, 8120, 9416, 16256, 23940, 25056, 28520, 30566, 32760, 36146, 37716, 39816, 55676, 56306, 65280, 66056, 129260, 135840, 143096, 149960, 155876, 176736, 185240, 198240, 198396, 202676, 232596, 252756, 257312, 296786
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