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 A140255 #19 Apr 27 2023 15:23:44
%S A140255 1,3,4,5,6,7,8,7,7,9,12,10,14,11,10,9,18,11,20,12,12,15,24,13,11,17,
%T A140255 10,14,30,15,32,11,16,21,14,15,38,23,18,15,42,17,44,18,14,27,48,16,15,
%U A140255 15,22,20,54,15,18,17,24,33,60,20,62,35,16,13,20,21,68,24,28,19,72,19,74
%N A140255 Inverse Mobius transform of A014963.
%H A140255 Jodi Spitz, <a href="/A140255/b140255.txt">Table of n, a(n) for n = 1..5000</a>
%F A140255 A051731 as an infinite lower triangular matrix * A014963 as a vector.
%F A140255 Equals row sums of triangle A140256. - _Gary W. Adamson_, May 16 2008
%F A140255 G.f.: Sum_{k>=1} M(k)*x^k/(1 - x^k), where M(k) is the exponential of Mangoldt function (A014963). - _Ilya Gutkovskiy_, Jan 16 2017
%e A140255 a(4) = 5 = (1, 1, 0, 1) dot (1, 2, 3, 2) = (1 + 2 + 0 + 2); where (1, 1, 0, 1) = row 4 of triangle A051731 and (1, 2, 3, 2) = the first 4 terms of A014963.
%o A140255 (PARI)
%o A140255 expmangoldt(n)=ispower(n, , &n); if(isprime(n), n, 1);
%o A140255 a(n) = sumdiv(n, d, expmangoldt(d)) \\ _Jodi Spitz_, Apr 11 2023
%Y A140255 Cf. A014963, A051731, A140254.
%Y A140255 Cf. A140256.
%K A140255 nonn
%O A140255 1,2
%A A140255 _Gary W. Adamson_ and _Mats Granvik_, May 16 2008
%E A140255 More terms from _R. J. Mathar_, Jan 19 2009