a(1)=2; thereafter a(n) is obtained by applying Eric Angelini's remove-repeated-digits map, x->A320486(x), to n*a(n-1), stopping when 0 is reached.
A321009
a(1)=2; thereafter a(n) is obtained by applying Eric Angelini's remove-repeated-digits map, x->A320486(x), to n*a(n-1), stopping when 0 is reached.
Terms
- a(0) =2a(1) =4a(2) =12a(3) =48a(4) =240a(5) =10a(6) =70a(7) =560a(8) =54a(9) =540a(10) =5940a(11) =71280a(12) =9240a(13) =129360a(14) =19a(15) =304a(16) =5168a(17) =93024a(18) =145a(19) =29a(20) =609a(21) =198a(22) =0
External references
- oeis: A321009