OFFSET
0,2
COMMENTS
Alternative construction: write n down in primorial base (as in A049345, taking care of not mangling digits larger than 9), increment all the digits by one, and multiply together to get a(n). a(0) = 1 either as an empty product, or as a product of any number of 1's. See examples.
LINKS
EXAMPLE
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Mar 10 2019
STATUS
approved