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 A129844 #30 Jan 27 2025 02:29:36
%S A129844 1,6,10,16,22,30,42,16,16,22,30,30,42,27,34,49,52,66,75,96,58,92,114,
%T A129844 136,168,182,220,270
%N A129844 Triangular sequence constructed from heights of irreducible representations of semi-simple Lie algebras (groups A1, G2, F4, E6, E7, E8).
%D A129844 R. N. Cahn, Semi-Simple Lie Algebras and Their Representations, Dover, NY, 2006, ISBN 0-486-44999-8, p. 139.
%D A129844 E. B. Dynkin, Semisimple subalgebras of semisimple Lie algebras, Amer. Math. Soc. Translations, Vol. 6, 1957, pages 111-244.
%e A129844 Triangle begins:
%e A129844 {1},
%e A129844 {6, 10},
%e A129844 {16, 22, 30, 42},
%e A129844 {16, 16, 22, 30, 30, 42},
%e A129844 {27, 34, 49, 52, 66, 75, 96},
%e A129844 {58, 92, 114, 136, 168, 182, 220, 270}.
%t A129844 a = {{1}, {6, 10}, {16, 22, 30, 42}, {16, 16, 22, 30, 30, 42}, {27, 34, 49, 52, 66, 75, 96}, {58, 92, 114, 136, 168, 182, 220, 270}}; Flatten[a]
%Y A129844 Cf. A120668 (rows sums), A124680, A129766.
%K A129844 nonn,fini,full,tabf
%O A129844 1,2
%A A129844 _Roger L. Bagula_, May 22 2007
%E A129844 Edited by _N. J. A. Sloane_, Dec 30 2008
%E A129844 a(26) corrected by _Andrey Zabolotskiy_, Jul 23 2024