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 A073472 #10 Apr 24 2022 17:19:50 %S A073472 1,2,4,7,11,17,25,36,50,68,92,121,159,205,262,332,417,520,645,793,971, %T A073472 1180,1430,1722,2065,2467,2934,3478,4109,4835,5676,6638,7747,9013, %U A073472 10459,12108,13980,16110,18522,21247,24333,27800,31715,36106,41039,46567 %N A073472 Trisection of A007294. %o A073472 (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, 2): n in [2..137 by 3] ]; // _Klaus Brockhaus_, Jan 23 2009 %Y A073472 Cf. A007294, A073471, A073470. %K A073472 nonn %O A073472 0,2 %A A073472 _Randall L Rathbun_, Aug 26 2002 %E A073472 More terms from _Klaus Brockhaus_, Jan 23 2009