Number of formula representations of n using addition, multiplication and the constant 1.

A214833

Number of formula representations of n using addition, multiplication and the constant 1.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =16a(5) =52a(6) =160a(7) =536a(8) =1796a(9) =6216a(10) =21752a(11) =77504a(12) =278720a(13) =1013184a(14) =3712128a(15) =13701204a(16) =50880808a(17) =190003808a(18) =712975648a(19) =2687114976a(20) =10167088608a(21) =38605365712a(22) =147060726688a(23) =561853414896

External references