Number of nonnegative integers that can be computed using exactly n n's and the four basic arithmetic operations {+, -, *, /}.

A258097

Number of nonnegative integers that can be computed using exactly n n's and the four basic arithmetic operations {+, -, *, /}.

Terms

    a(0) =1a(1) =3a(2) =9a(3) =26a(4) =68a(5) =198a(6) =536a(7) =1660a(8) =4769a(9) =15945a(10) =46240a(11) =165732a(12) =488268a(13) =1848866a(14) =5852344

External references