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 A268720 #7 Feb 14 2016 14:56:53
%S A268720 0,4,13,18,53,55,63,80,217,217,205,244,234,264,305,328,881,877,841,
%T A268720 916,790,864,977,988,900,956,1021,1070,1197,1235,1267,1344,3553,3541,
%U A268720 3457,3604,3310,3456,3681,3684,3100,3244,3453,3478,3917,3931,3883,4048,3528,3636,3757,3850,4021,4111,4199,4320,4745,4817
%N A268720 Row sums of A268719: a(n) = Sum_{k=0..n} A003188(A006068(n)+A006068(k)).
%H A268720 Antti Karttunen, <a href="/A268720/b268720.txt">Table of n, a(n) for n = 0..8191</a>
%F A268720 a(n) = Sum_{k=0..n} A003188(A006068(n)+A006068(k)).
%o A268720 (Scheme)
%o A268720 (define (A268720 n) (add (lambda (k) (A268715bi n k)) 0 n)) ;; Code for A268715bi given in A268715.
%o A268720 (define (add intfun lowlim uplim) (let sumloop ((i lowlim) (res 0)) (cond ((> i uplim) res) (else (sumloop (1+ i) (+ res (intfun i)))))))
%Y A268720 Row sums of triangle A268719.
%Y A268720 Cf. A003188, A006068, A268715.
%K A268720 nonn
%O A268720 0,2
%A A268720 _Antti Karttunen_, Feb 13 2016