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A038536
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Odd values of n > 1 for which there are n-hyperperfect numbers.
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4
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3, 11, 19, 31, 35, 59, 75, 91, 111, 115, 131, 151, 179, 235, 255, 311, 335, 339, 371, 375, 399, 411, 431, 439, 495, 515, 531, 539, 551, 591, 619, 675, 739, 791, 795, 811, 839, 851, 871, 915, 951, 999, 1015, 1035, 1039, 1055, 1071, 1075, 1155, 1231, 1351
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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REFERENCES
| D. Minoli, Issues in non-linear hyperperfect numbers, Math. Comp., 34 (1980), 639-645.
J. Roberts, Lure of the Integers, Math. Assoc. America, 1992, p. 177.
R. K. Guy, Unsolved Problems in Number Theory, B2.
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LINKS
| J. S. McCranie, A study of hyperperfect numbers, J. Int. Seqs. Vol. 3 (2000) #P00.1.3
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CROSSREFS
| Cf. A007592.
Sequence in context: A112422 A125994 A137295 * A175122 A031369 A014223
Adjacent sequences: A038533 A038534 A038535 * A038537 A038538 A038539
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KEYWORD
| nonn
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AUTHOR
| Jud McCranie JudMcCranie(AT)ugaalum.uga.edu
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EXTENSIONS
| [ (3*a(i)+1)/2 ]^2*(3*a(i)+4) is a(i)-hyperperfect
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