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 A357120 #10 Sep 14 2022 08:26:26 %S A357120 1,2,1,2,4,1,4,2,4,7,1,7,2,7,1,2,7,4,7,1,4,7,13,1,13,2,13,1,2,13,4,13, %T A357120 1,4,13,2,4,13,7,13,1,7,13,2,7,13,1,2,7,13,24,1,24,2,24,1,2,24,4,24,1, %U A357120 4,24,2,4,24,7,24,1,7,24,2,7,24,1,2,7,24,4,7,24 %N A357120 Irregular triangle T(n, k), n > 0, k = 1..A278043(n); the n-th row contains, in ascending order, the terms in the greedy tribonacci representation of n. %C A357120 See A357121 for the sequence corresponding to lazy tribonacci representations. %H A357120 Rémy Sigrist, <a href="/A357120/a357120.gp.txt">PARI program</a> %H A357120 <a href="/index/Z#Zeckendorf">Index entries for sequences related to Zeckendorf expansion of n</a> %F A357120 T(n, 1) = A275392(n). %F A357120 Sum_{k = 1..A278043(n)} T(n, k) = n. %e A357120 Triangle T(n, k) begins: %e A357120 1: [1] %e A357120 2: [2] %e A357120 3: [1, 2] %e A357120 4: [4] %e A357120 5: [1, 4] %e A357120 6: [2, 4] %e A357120 7: [7] %e A357120 8: [1, 7] %e A357120 9: [2, 7] %e A357120 10: [1, 2, 7] %e A357120 11: [4, 7] %e A357120 12: [1, 4, 7] %e A357120 13: [13] %e A357120 14: [1, 13] %e A357120 15: [2, 13] %o A357120 (PARI) See Links section. %Y A357120 Cf. A000073, A035516, A035517, A275392, A278043, A278038, A357121. %K A357120 nonn,tabf %O A357120 1,2 %A A357120 _Rémy Sigrist_, Sep 12 2022