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 A073471 #10 Apr 24 2022 17:19:46 %S A073471 1,2,4,7,11,17,24,35,48,66,89,117,153,197,252,320,401,501,619,763,933, %T A073471 1134,1374,1654,1985,2372,2821,3345,3949,4652,5460,6390,7457,8676, %U A073471 10071,11662,13468,15526,17850,20487,23463,26818,30598,34842,39614,44962 %N A073471 Trisection of A007294. %o A073471 (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 [1..136 by 3] ]; // _Klaus Brockhaus_, Jan 23 2009 %Y A073471 Cf. A007294, A073470, A073472. %K A073471 nonn %O A073471 0,2 %A A073471 _Randall L Rathbun_, Aug 26 2002 %E A073471 More terms from _Klaus Brockhaus_, Jan 23 2009