Product of the digital sums of n for all the bases 2 to n (a 'digital-sum factorial').
A131384
Product of the digital sums of n for all the bases 2 to n (a 'digital-sum factorial').
Terms
- a(0) =1a(1) =1a(2) =2a(3) =2a(4) =12a(5) =24a(6) =216a(7) =192a(8) =720a(9) =3840a(10) =97200a(11) =69120a(12) =2721600a(13) =14515200a(14) =130636800a(15) =30965760a(16) =3810240000a(17) =3762339840a(18) =384072192000a(19) =445906944000
External references
- oeis: A131384