Math is a hobby of mine, and I quite often experiment and make discoveries with numbers. I'm just here to contribute what I find that is not already in this database. Quite often I work with algebraic operations in multiple dimensions. Occasionally I work with geometry as well. For example, in a tessellation of equilateral triangles each with sides 1 unit long, within a regular hexagonal boundary with diagonals of length 4n-2, the number of concave regular and irregular hexagons that can fit within each boundary in a unique position is 1, 19, 131, 543, etc. I like to observe patterns in sequences, and of course, finding or devising a formula is almost always a goal of mine.