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.
A decagon with no other points along its edges, n = 1, contains 120 triangles, 90 quadrilaterals, 10 pentagons and no other n-gons, so the first row is [120, 90, 10]. A decagon with 1 point dividing its edges, n = 2, contains 2040 triangles, 1580 quadrilaterals, 460 pentagons, 140 hexagons and no other n-gons, so the second row is [2040,1580,460,140]. Table begins: 120, 90, 10; 2040,1580,460,140; 10860,8570,4170,1380,210,20,10; 34360,30420,14240,4020,1120,100,20; 85600,76920,38610,13360,2650,550,110; 176760, 166400, 82560, 24500, 5500, 760, 140, 20; 327550, 320520, 159860, 51610, 10960, 2250, 300, 30, 0, 10; 565060, 549520, 277360, 86540, 18960, 3560, 480, 20, 20; 910920, 891290, 447790, 147300, 32180, 5640, 720, 130, 40, 10; The row sums are A333139.
The table begins: 3, 10, 58, 178, 558, 1255, 2532, 4786, 7804, 12292, 18966, 28540, 39117, 56107, ... 5, 37, 257, 817, 2757, 4825, 12293, 19241, 33549, 49577, 87685, 101981, 178465, ... 10, 121, 1055, 3506, 10410, 21111, 43740, 74526, 124490, 190291, 288190, ... 19, 301, 1753, 6913, 17713, 38497, 80473, 139927, 225595, 356329, 549967, ... 42, 708, 5369, 17417, 47796, 99261, 194278, 331955, 546805, 833946, 1245314, ... 57, 1145, 8417, 29121, 80345, 167105, 333297, 570969, 939113, 1441153, 2153937, ... 135, 2395, 16434, 53155, 141147, 293374, 565767, 966493, 1580940, 2411533, ... 171, 3581, 23651, 80191, 213041, 444251, 862711, 1481141, 2413721, 3701951, ... 341, 6062, 39248, 126061, 329131, 684223, 1307845, 2233815, 3639020, 5549952, ... 313, 7513, 47293, 167941, 450457, 931345, 1830625, 3132349, 5103589, 7825201, ... 728, 12845, 79859, 255711, 660140, 1372008, 2608476, 4454477, 7236853, ... 771, 16871, 103517, 343855, 881959, 1847525, 3504971, 6013953, 9739227, ... 1380, 24136, 145635, 465721, 1192710, 2478121, 4694040, 8014891, 12995535, ... 1393, 30305, 182785, 602337, 1533681, 3211873, 6067041, 10402769, 16824161, ... 2397, 41583, 245684, 783803, 1995341, 4145230, 7829333, 13366897, ... 1855, 46801, 291637, 967123, 2476873, 5166055, 9798175, ... 3895, 67090, 389690, 1241765, 3146533, 6535659, 12317567, ... 3861, 80921, 466141, 1522001, 3840181, 8027441, 15094521, ... 6006, 102817, 589029, 1875511, 4734786, 9833104, ... 5963, 122849, 694387, 2259005, 5671887, 11852105, ... 8878, 151180, 856589, 2725041, 6858600, 14242153, ... 7321, 169297, 979777, 3205921, 8068321, ... 12675, 214851, 1206050, 3834451, 9626475, ... . . .
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