OFFSET
1,1
EXAMPLE
4^10 = 1048576 starts with 10, so 10 is in the sequence.
MAPLE
filter:= proc(n) local t, b;
t:= 4^n;
b:= ilog10(t) - ilog10(n);
floor(t/10^b) = n
end proc:
select(filter, [$1..10^5]);
PROG
(Python)
def afind(limit, startk=1):
k, pow4 = startk, 4**startk
for k in range(startk, limit+1):
if str(pow4).startswith(str(k)):
print(k, end=", ")
pow4 *= 4
afind(10**4) # Michael S. Branicky, Oct 17 2021
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
Robert Israel, Oct 24 2018
EXTENSIONS
a(8)-a(10) from Giovanni Resta, Oct 25 2018
STATUS
approved