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 A073470 #10 Apr 24 2022 17:19:42 %S A073470 1,2,4,6,10,15,22,32,44,60,81,107,141,181,233,295,372,465,575,710,869, %T A073470 1059,1286,1549,1863,2225,2654,3149,3724,4391,5157,6043,7059,8220, %U A073470 9553,11066,12798,14760,16988,19509,22357,25576,29200,33274,37856,42985 %N A073470 Trisection of A007294. %o A073470 (Magma) function a007294(n, k) return n gt k*(k+1)/2 select a007294(n-k*(k+1)/2, k) + a007294(n, k+1) else n eq k*(k+1)/2 select 1 else 0; end function; [ a007294(n, 1): n in [0..135 by 3] ]; // _Klaus Brockhaus_, Jan 23 2009 %Y A073470 Cf. A007294, A073471, A073472. %K A073470 nonn %O A073470 0,2 %A A073470 _Randall L Rathbun_, Aug 26 2002 %E A073470 More terms from _Klaus Brockhaus_, Jan 23 2009