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A122409
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Numbers n such that between n^2 and (n+1)^2 there is no cube.
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0
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1, 3, 4, 6, 7, 8, 9, 10, 12, 13, 15, 16, 17, 19, 20, 21, 23, 24, 25, 26, 27, 28, 29, 30, 32, 33, 34, 35, 37, 38, 39, 40, 42, 43, 44, 45, 47, 48, 49, 50, 51, 53, 54, 55, 56, 57, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 71, 72, 73, 74, 75, 77, 78, 79, 80, 81, 83, 84, 85, 86, 87
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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EXAMPLE
| 4 is OK because between 4^2=16 and 5^2=25 there is no cube,
5 is not OK because between 5^2=25 and 6^2=36 there is one cube, 27.
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MAPLE
| A:={seq(x^3, x=1..90)}: a:=proc(n) if {seq(y, y=n^2+1..(n+1)^2-1)} intersect A ={} then n else fi end: seq(a(n), n=1..90); - Emeric Deutsch (deutsch(AT)duke.poly.edu), Oct 25 2006
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CROSSREFS
| Sequence in context: A066533 A039130 A004712 * A039093 A085925 A107907
Adjacent sequences: A122406 A122407 A122408 * A122410 A122411 A122412
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KEYWORD
| nonn
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AUTHOR
| Zak Seidov (zakseidov(AT)yahoo.com), Oct 19 2006
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