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A098475
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a(k) is the smallest integer for which sigma_k(n) <= sigma_k(n-1) where sigma_k(n) = sum of the k-th powers of the divisors of n.
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1
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3, 5, 7, 25, 61, 145, 361, 853, 1969, 4489, 10069, 22273, 48781, 105949, 228589, 490405, 1046977, 2225965, 4715401, 9956977, 20965213, 44031361, 92262349, 192920785, 402629257, 838827577, 1744784389, 3623814865, 7516104565
(list; graph; refs; listen; history; internal format)
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