1,2

Listed 10 terms are 1, 2^2, 2^3, 2^4, 2^5, 3^4, 12^2, 15^2, 3^5, 24^2.

1, 4, 8, 16, 32, 81, 343 are also members of A000961.

1, 4, 8, 16, 144 are in the intersection of this sequence and A272575.

Is this sequence finite?

If a(11) exists, it must be larger than 10^2000. - Giovanni Resta, May 25 2016

Table of n, a(n) for n=1..10.

32 is a term because 32 = 2^5 = 34 - 2 = Fibonacci(9) - Fibonacci(3).

isA272712 := proc(n)

isA001597(n) and isA007298(n) ; #uses code in A001597 and A007298

end proc:

for n from 1 do

if isA272712(n) then

printf("%d\n", n) ;

end if;

end do: # R. J. Mathar, May 25 2016

Cf. A007298, A001597, A219114, A272575.

Sequence in context: A049934 A089890 A049932 * A020161 A068890 A073856

Adjacent sequences: A272709 A272710 A272711 * A272713 A272714 A272715

nonn,more

Altug Alkan, May 05 2016

approved