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Search: id:A076944
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| A076944 |
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Least number such that n*k+1 is an n-th power. |
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+0
3
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| 2, 9, 64, 81, 7776, 15625, 2097152, 6561, 262144, 3486784401, 743008370688, 244140625, 793714773254144, 3937376385699289, 1152921504606846976, 43046721, 2185911559738696531968, 3814697265625
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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a(n) <= {(n+1)^n - 1}/n.
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FORMULA
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a(n) = n*A076943(n) + 1.
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MATHEMATICA
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Do[k = 2; While[ !IntegerQ[(k^n - 1)/n], k++ ]; Print[k^n], {n, 1, 19}]
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CROSSREFS
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Cf. A076942, A076943, A074792.
Sequence in context: A003577 A085928 A130169 this_sequence A074181 A052513 A024720
Adjacent sequences: A076941 A076942 A076943 this_sequence A076945 A076946 A076947
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Oct 19 2002
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EXTENSIONS
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Edited, corrected and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), Oct 21 2002
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