cp's OEIS Frontend

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.

A356744 Numbers k such that both k and k+2 have exactly 8 divisors.

This page as a plain text file.
%I A356744 #8 Aug 25 2022 09:13:22
%S A356744 40,54,102,128,136,152,182,184,230,246,248,374,424,470,472,534,582,
%T A356744 663,710,806,822,824,854,872,902,904,999,1105,1192,1256,1309,1334,
%U A356744 1336,1432,1446,1526,1542,1545,1576,1593,1645,1686,1784,1832,1864,1885,1910,1928,2006,2013
%N A356744 Numbers k such that both k and k+2 have exactly 8 divisors.
%H A356744 Jianing Song, <a href="/A356744/b356744.txt">Table of n, a(n) for n = 1..10000</a>
%e A356744 54 is a term since 54 and 56 both have 8 divisors.
%o A356744 (PARI) isA356744(n) = numdiv(n)==8 && numdiv(n+2)==8
%Y A356744 Numbers k such that k and k+2 both have exactly m divisors: A001359 (m=2), A356742 (m=4), A356744 (m=6), this sequence (m=8).
%Y A356744 Cf. also A274357 (numbers k such that k and k+1 both have exactly 8 divisors).
%K A356744 nonn
%O A356744 1,1
%A A356744 _Jianing Song_, Aug 25 2022