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Search: id:A128705
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| A128705 |
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Numbers of the form 7^k*p, where 1 <= k <= 4 and p is a prime different from 7. |
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+0
2
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| 14, 21, 35, 77, 91, 98, 119, 133, 147, 161, 203, 217, 245, 259, 287, 301, 329, 371, 413, 427, 469, 497, 511, 539, 553, 581, 623, 637, 679, 686, 707, 721, 749, 763, 791, 833, 889, 917, 931, 959, 973, 1029, 1043, 1057, 1099, 1127, 1141, 1169, 1211, 1253, 1267
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Auxiliary sequence for A128706 which gives the number of groups of order a(n).
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LINKS
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K. Brockhaus, Table of n, a(n) for n=1..10000
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EXAMPLE
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931 = 7^2*19 is a term.
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PROGRAM
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(MAGMA) [ n: n in [1..1300] | #t eq 2 and ((t[1, 1] lt 7 and t[1, 2] eq 1 and t[2, 1] eq 7 and t[2, 2] le 4) or (t[1, 1] eq 7 and t[1, 2] le 4 and t[2, 2] eq 1)) where t is Factorization(n) ];
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CROSSREFS
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Cf. A128706, A000420 (powers of 7).
Sequence in context: A100466 A100467 A094393 this_sequence A073250 A082802 A113190
Adjacent sequences: A128702 A128703 A128704 this_sequence A128706 A128707 A128708
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KEYWORD
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nonn
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AUTHOR
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Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Mar 26 2007
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