Similar to 自己同形数

Decagonal number

Dodecagonal number

Power of 10

Cyclic number

Strobogrammatic number

Prime power

Refactorable number

Singly and doubly even

Centered nonagonal number

Centered pentagonal number

Centered triangular number

Centered square number

Centered tetrahedral number

Centered polygonal number

Centered heptagonal number

Centered octagonal number

Centered octahedral number

Centered hexagonal number

Centered cube number

Dedekind number

Heptagonal number

Lazy caterer's sequence

Binomial coefficient

Double factorial

Fourth power