Similar to 4の冪

Taxicab number

Powerful number

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

Central binomial coefficient

Centered cube number

Superabundant number

Superperfect number

Harmonic divisor number

Dedekind number

Heptagonal number

Lazy caterer's sequence

Narcissistic number

Binomial coefficient

Double factorial

Fourth power

Double Mersenne number

Nontotient