[seqfan] Re: Filling squares and triangles (with digits)

[Heinz, Alois]

Dear Eric,

"square-filling":
1, 4, 9, 17, 29, 45, 65, 89, 111, 144, 183, 228, 279, 336, 399, 468,
543, 624, 711, 804, 903, 1033, 1089, 1147, 1207, 1269, 1333, 1399,
1467, 1537, 1609, 1683, 1759, 1837, 1917, 1999, 2083, 2169, 2257,
2347, 2439, 2533, 2629, 2727, 2827, 2929, 3033, 3139, 3247, 3357,
3469, 3583, 3699, 3817, 3937, 4059, 4183, 4309, 4437, 4567, 4699,
4833, 4969, 5107, 5247, 5389, 5533, 5679, 5827, 5977, 6129, 6283,
6439, 6597, 6757, 6919, 7083, 7249, 7417, 7587, 7759, 7933, 8109,
8287, 8467, 8649, 8833, 9019, 9207, 9397, 9589, 9783, 9979

"right-triangle-filling":
1, 3, 6, 12, 15, 27, 32, 50, 57, 81, 90, 106, 113, 128, 136, 153, 162,
181, 191, 212, 223, 246, 258, 283, 296, 323, 337, 366, 381, 412, 428,
461, 478, 513, 531, 568, 587, 626, 646, 687, 708, 751, 773, 818, 841,
888, 912, 961, 986, 1047, 1107, 1212, 1278, 1393, 1465, 1590, 1668,
1803, 1887, 2032, 2122, 2277, 2373, 2538, 2640, 2815, 2923, 3108,
3222, 3417, 3537, 3742, 3868, 4083, 4215, 4440, 4578, 4813, 4957,
5202, 5352, 5607, 5763, 6028, 6190, 6465, 6633, 6918, 7092, 7387,
7567, 7872, 8058, 8373, 8565, 8890, 9088, 9423, 9627, 9972

Best regards, Alois