Product of the nonzero digital products of n for all the bases 1 to n (a 'total digital-product factorial').
A131387
Product of the nonzero digital products of n for all the bases 1 to n (a 'total digital-product factorial').
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =4a(6) =12a(7) =48a(8) =48a(9) =192a(10) =2880a(11) =2880a(12) =25920a(13) =552960a(14) =3265920a(15) =1935360a(16) =116121600a(17) =278691840a(18) =9405849600a(19) =26754416640a(20) =94058496000
External references
- oeis: A131387