Dodecagonal number

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A dodecagonal number is a figurate number that represents a dodecagon. The dodecagonal number for n is given by the formula

${\displaystyle D_{n}=5n^{2}-4n}$

The first few dodecagonal numbers are:

0, 1, 12, 33, 64, 105, 156, 217, 288, 369, 460, 561, 672, 793, 924, 1065, 1216, 1377, 1548, 1729, ... (sequence A051624 in the OEIS)