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 A158236 #17 Aug 08 2025 03:54:06 %S A158236 3,7,22,7,18,22,30,68,68,313,313,41,313,146,653,313,499,313,710,313, %T A158236 653,313,423,313,292,499,313,653,313,710,439,499,653,699,99,4366,423, %U A158236 653,521,581,499,710,653,653,710,4701,653,699,4366,710,653,4611,787,2272 %N A158236 The base for the numbers in A158235. %C A158236 The prime 313 appears 10 times. Which numbers are allowed as bases? %H A158236 Michael De Vlieger and Michel Marcus, <a href="/A158236/b158236.txt">Table of n, a(n) for n = 1..100</a> (first 75 terms from Michel Marcus). %e A158236 From _Michael De Vlieger_, Sep 08 2017: (Start) %e A158236 Bases that appear, for numbers 2 <= m <= 101000 in A158235, i.e., for 1 <= n <= 100. f = frequency of b in a(n) for m in the range shown above: %e A158236 Base b f Prime factors of b %e A158236 ------------------------------ %e A158236 3 1 3 %e A158236 7 2 7 %e A158236 18 1 2, 3, 3 %e A158236 22 2 2, 11 %e A158236 30 1 2, 3, 5 %e A158236 41 1 41 %e A158236 68 2 2, 2, 17 %e A158236 99 1 3, 3, 11 %e A158236 146 1 2, 73 %e A158236 239 2 239 %e A158236 292 1 2, 2, 73 %e A158236 313 10 313 %e A158236 423 2 3, 3, 47 %e A158236 439 1 439 %e A158236 499 4 499 %e A158236 521 1 521 %e A158236 581 1 7, 83 %e A158236 653 9 653 %e A158236 699 2 3, 233 %e A158236 710 6 2, 5, 71 %e A158236 787 1 787 %e A158236 1047 1 3, 349 %e A158236 1353 1 3, 11, 41 %e A158236 1425 1 3, 5, 5, 19 %e A158236 1660 1 2, 2, 5, 83 %e A158236 1714 1 2, 857 %e A158236 2060 1 2, 2, 5, 103 %e A158236 2174 1 2, 1087 %e A158236 2198 1 2, 7, 157 %e A158236 2272 5 2, 2, 2, 2, 2, 71 %e A158236 2819 4 2819 %e A158236 3019 1 3019 %e A158236 4366 13 2, 37, 59 %e A158236 4526 2 2, 31, 73 %e A158236 4611 6 3, 29, 53 %e A158236 4701 8 3, 1567 %e A158236 6205 1 5, 17, 73 %e A158236 (End) %t A158236 (* See A158235. *) %Y A158236 Cf. A158235, A158237. %K A158236 nonn %O A158236 1,1 %A A158236 _T. D. Noe_, Mar 14 2009