“Star Numbers” are numbers which can be represented in the shape of "Centered Hexagrams" (Six Pointed Stars). These appear as concentric layers of dots, each layer being arranged in the shape of a hexagram, around a central dot.

Below are representations of the first few:

Position from 1 Star Number

Position from 13
1 1
2 13 1
3 37 2
4 73 3
5 121 4
6 181 5
7 253 6
8 337 7
9 433 8
10 541 9
11 661 10
12 793 11
13 937 12
14 1093 13
15 1261 14
16 1441 15
17 1633 16