A358716 a(n) is the number of inequivalent ways to cut an equilateral triangle with edges of size n into equilateral triangles with integer sides.

1, 2, 3, 12, 50, 711, 18031, 952013, 92323440

Offset: 1

Author

Craig Knecht and John Mason, Nov 28 2022

Keywords

• nonn
• more

Comments

Similar to A358715, but now we do not regard dissections which differ by a rotation and/or reflection as distinct.

Examples

			a(3)=3 because of:
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  /    \  /  \/\  /\/\/\
		

Crossrefs

Cf. A224239, A358715.

Cf. A299705.