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A061258
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a(n)=Sum_{d|n} d*psi(d), where psi(d) is reduced totient function, cf. A002322.
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5
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1, 3, 7, 11, 21, 21, 43, 27, 61, 63, 111, 53, 157, 129, 87, 91, 273, 183, 343, 151, 175, 333, 507, 117, 521, 471, 547, 305, 813, 261, 931, 347, 447, 819, 483, 431, 1333, 1029, 631, 327, 1641, 525, 1807, 781, 681, 1521, 2163, 373, 2101, 1563, 1095, 1103, 2757
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OFFSET
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1,2
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COMMENTS
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LINKS
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PROG
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(Haskell)
a061258 n = sum $ zipWith (*) ds $ map a002322 ds
where ds = a027750_row n
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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