OFFSET
0,1
COMMENTS
All terms are multiples of 3, with A007949(a(n)) = 1 for all n.
LINKS
MATHEMATICA
f[x_] := Block[{m, i, n = x, p}, m = i = 1; While[n > 0, p = Prime[i]; m *= p^Mod[n, p]; n = Quotient[n, p]; i++]; m]; Array[GCD[#, f[#]] &[36 # + 9] &, 100, 0] (* Michael De Vlieger, Mar 10 2024, after Jean-François Alcover at A276086 *)
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Mar 10 2024
STATUS
approved