Originally Posted by

**thebluetriangle**
They are centred triangles and 901 is the 25th. The sequence runs:

1, 4, 10, 19, 31, 46, 64, 85, 109, 136, 166, 199, **235**, 274, 316, 361, 409, 460, 514, 571, 631, 694, 760, 829, **901**, . . . .

Centred triangles have slightly different properties from regular triangles. Every member of the sequence will form a hexagram/hexagon pair, for example. They will all form trefoils too. Trefoil 2701 is formed from three conjoined centred triangles of 901 units each. So (901 x 3) - 2 = 2701. 703 is also a trefoil, formed from centred triangle 235.

By 'trefoil' I mean rhombic trefoils growing from a single unit, which all centred triangles and all G-triangles will form. Triangular trefoils have the same general form, but each leaf is a triangle rather than a rhombus.

Incidentally, centred triangle 694 self-intersects to form star 925:

Jesus Christ (s) = 925

Our Redeemer (s) = 694

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