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

A214843

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

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =16a(5) =48a(6) =152a(7) =502a(8) =1694a(9) =5832a(10) =20420a(11) =72472a(12) =260096a(13) =942304a(14) =3441584a(15) =12658128a(16) =46842920a(17) =174289108a(18) =651610504a(19) =2446686568a(20) =9222628592a(21) =34886505168a(22) =132387975040a(23) =503857644160

External references