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.

2, 4, 12, 48, 240, 10, 70, 560, 54, 540, 5940, 71280, 9240, 129360, 19, 304, 5168, 93024, 145, 29, 609, 198, 0

Offset: 1

Author

N. J. A. Sloane, Nov 03 2018

Keywords

• nonn
• base
• fini
• full

Examples

			a(5)=240, so for a(6) we compute 6*240 = 1440 which becomes 10 = a(6).
		

References

• Eric Angelini, Posting to Sequence Fans Mailing List, Oct 24 2018

Crossrefs

Cf. A320485, A320486, A321008.