This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A128705 #6 Sep 08 2022 08:45:30 %S A128705 14,21,35,77,91,98,119,133,147,161,203,217,245,259,287,301,329,371, %T A128705 413,427,469,497,511,539,553,581,623,637,679,686,707,721,749,763,791, %U A128705 833,889,917,931,959,973,1029,1043,1057,1099,1127,1141,1169,1211,1253,1267 %N A128705 Numbers of the form 7^k*p, where 1 <= k <= 4 and p is a prime different from 7. %C A128705 Auxiliary sequence for A128706 which gives the number of groups of order a(n). %H A128705 Klaus Brockhaus, <a href="/A128705/b128705.txt">Table of n, a(n) for n=1..10000</a> %e A128705 931 = 7^2*19 is a term. %o A128705 (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) ]; %Y A128705 Cf. A128706, A000420 (powers of 7). %K A128705 nonn %O A128705 1,1 %A A128705 _Klaus Brockhaus_, Mar 26 2007