A128705 Numbers of the form 7^k*p, where 1 <= k <= 4 and p is a prime different from 7.
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
Offset: 1
Keywords
Examples
931 = 7^2*19 is a term.
Links
- Klaus Brockhaus, Table of n, a(n) for n=1..10000
Programs
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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) ];
Comments