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 A214153 #18 Aug 29 2020 06:53:36 %S A214153 1,10,22,34,46,55,58,64,82,85,91,94,106,112,115,118,133,142,145,166, %T A214153 178,187,202,205,208,214,217,226,235,247,253,259,262,265,274,280,295, %U A214153 298,301,304,319,334,343,346,355,358,382,391,394,403,415,427,445,451 %N A214153 Numbers k for which k and tau(k) are both congruent to 1 modulo 3. %H A214153 Amiram Eldar, <a href="/A214153/b214153.txt">Table of n, a(n) for n = 1..10000</a> %e A214153 The divisors of 10 are: 1, 2, 5, 10 (4 divisors). 10 and 4 are both congruent to 1 modulo 3. Thus 10 is a member of this sequence. %t A214153 Select[Range[1, 500, 3], Mod[DivisorSigma[0, #], 3] == 1 &] (* _T. D. Noe_, Jul 09 2012 *) %Y A214153 Intersection of A016777 and A211337. %Y A214153 Cf. A000005. %K A214153 nonn %O A214153 1,2 %A A214153 _Gerasimov Sergey_, Jul 05 2012