OFFSET
1,1
COMMENTS
Related to A225252.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..1000
PROG
(PARI) a(n) = my(v=setbinop((x, y)->x+y, setbinop((x, y)->x*y, [0..n]))); for(k=0, vecmax(v)+1, if (!vecsearch(v, k), return(k))); \\ Michel Marcus, Sep 07 2023
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 04 2013
STATUS
approved