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

A214836

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

Terms

    a(0) =1a(1) =1a(2) =2a(3) =7a(4) =18a(5) =58a(6) =180a(7) =613a(8) =2076a(9) =7270a(10) =25752a(11) =92918a(12) =338432a(13) =1246092a(14) =4624536a(15) =17290646a(16) =65047436a(17) =246079536a(18) =935484928a(19) =3571960668a(20) =13692523960a(21) =52675401248a(22) =203299385584a(23) =786949008100

External references