OFFSET
1,1
COMMENTS
a(490) = a(491) = 0 and so the value of a(1306) is perhaps controversial. I have used the combinatorial definition 0^0 = 1 in my PARI script below. - Charles R Greathouse IV, Feb 15 2024
EXAMPLE
a(3)=a(1)^a(2), a(4)=first digit of a(2)^a(3)=3^8=6561, a(5)=2nd digit of a(2)^a(3)=3^8=6561, a(6)=3rd digit of a(2)^a(3)=3^8=6561
PROG
(PARI) list(lim)=my(v=List([2, 3]), i=1); while(#v<lim, my(t=digits(v[i]^v[i++])); if(#t==0, listput(v, 0), for(i=1, #t, listput(~v, t[i])))); while(#v>lim, listpop(~v)); Vec(v) \\ Charles R Greathouse IV, Feb 15 2024
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
Bodo Zinser, Mar 20 2004
STATUS
approved