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A321008 a(1)=1; 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. 3
1, 2, 6, 24, 120, 720, 54, 432, 3, 30, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

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

LINKS

Table of n, a(n) for n=1..11.

N. J. A. Sloane, Coordination Sequences, Planing Numbers, and Other Recent Sequences (II), Experimental Mathematics Seminar, Rutgers University, Jan 31 2019, Part I, Part 2, Slides. (Mentions this sequence)

EXAMPLE

a(6)=720, so for a(7) we compute 7*720 = 5040 which becomes 54 = a(7).

CROSSREFS

Cf. A320485, A320486, A321009.

Sequence in context: A071088 A177533 A122417 * A033644 A212309 A319546

Adjacent sequences:  A321005 A321006 A321007 * A321009 A321010 A321011

KEYWORD

nonn,base,fini,full

AUTHOR

N. J. A. Sloane, Nov 03 2018

STATUS

approved

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Last modified September 24 22:28 EDT 2020. Contains 337325 sequences. (Running on oeis4.)