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A002049
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Prime numbers of measurement.
(Formerly M2633 N1044)
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5
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1, 3, 7, 12, 20, 30, 44, 59, 75, 96, 118, 143, 169, 197, 230, 264, 299, 335, 373, 413, 455, 501, 549, 598, 648, 701, 758, 818, 880, 944, 1009, 1079, 1156, 1236, 1317, 1400
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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REFERENCES
| G. E. Andrews, MacMahon's prime numbers of measurement, Amer. Math. Monthly, 82 (1975), 922-923.
R. K. Guy, Unsolved Problems in Number Theory, E30.
P. A. MacMahon, The prime numbers of measurement on a scale, Proc. Camb. Phil. Soc. 21 (1923), 651-654; reprinted in Coll. Papers I, pp. 797-800.
Problem E1910, Amer. Math. Monthly, 75 (1968), 80-81.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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CROSSREFS
| Cf. A002048.
a(n) = A004978(n+1)-1 = A048204(n-1)+1.
Sequence in context: A132273 A130050 A173256 * A025582 A029452 A034434
Adjacent sequences: A002046 A002047 A002048 * A002050 A002051 A002052
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KEYWORD
| nonn,nice
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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