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A052462
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a(n) is the solution k to Mod[24k,5^n]==1.
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3
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4, 24, 99, 599, 2474, 14974, 61849, 374349, 1546224, 9358724, 38655599, 233968099, 966389974, 5849202474, 24159749349, 146230061849, 603993733724, 3655751546224, 15099843343099, 91393788655599, 377496083577474
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Related to a Ramanujan congruence for the partition function P.
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LINKS
| Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
Index to sequences with linear recurrences with constant coefficients, signature (1,25,-25).
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FORMULA
| G.f.: x(-25x^2+20x+4)/[(1-x)(1-5x)(1+5x)].
a(n) = (1+(21+2*(-1)^n)*5^n)/24 - Bruno Berselli, Apr 04 2011
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MATHEMATICA
| Table[PowerMod[24, -1, 5^a], {a, 21}]
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CROSSREFS
| Cf. A052463, A052464, A052466.
Sequence in context: A100738 A139238 A139231 * A048806 A043009 A006736
Adjacent sequences: A052459 A052460 A052461 * A052463 A052464 A052465
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KEYWORD
| nonn,easy
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AUTHOR
| Eric Weisstein (eric(AT)weisstein.com)
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