Editing Centered triangular number (section)

==Lists of centered triangular numbers==
The first centered triangular numbers (''C''<sub>3,''n''</sub> < 3000) are:

:[[1 (number)|1]], [[4 (number)|4]], [[10 (number)|10]], [[19 (number)|19]], [[31 (number)|31]], [[46 (number)|46]], [[64 (number)|64]], [[85 (number)|85]], [[109 (number)|109]], [[136 (number)|136]], [[166 (number)|166]], [[199 (number)|199]], [[235 (number)|235]], [[274 (number)|274]], 316, 361, 409, 460, 514, 571, 631, 694, 760, 829, 901, 976, 1054, 1135, 1219, 1306, 1396, 1489, 1585, 1684, 1786, 1891, 1999, 2110, 2224, 2341, 2461, 2584, 2710, 2839, 2971, … {{OEIS|id=A005448}}.

The first simultaneously triangular and centered triangular numbers (''C''<sub>3,''n''</sub> = ''T''<sub>''N''</sub> < 10<sup>9</sup>) are:

:1, 10, 136, 1 891, 26 335, 366 796, 5 108 806, 71 156 485, 991 081 981, … {{OEIS|id=A128862}}.