Number of zerofree positive integers of at most n digits having product of digits less than or equal to sum of digits.

A254622

Number of zerofree positive integers of at most n digits having product of digits less than or equal to sum of digits.

Terms

    a(0) =9a(1) =27a(2) =61a(3) =124a(4) =255a(5) =474a(6) =860a(7) =1597a(8) =2726a(9) =4232a(10) =6741a(11) =10391a(12) =16177a(13) =24480a(14) =34926a(15) =47875a(16) =65896a(17) =92255a(18) =139262a(19) =198988a(20) =271642a(21) =357674a(22) =474239a(23) =609442a(24) =773493a(25) =1029477a(26) =1404094a(27) =1857856a(28) =2392385a(29) =3169652

External references