|
%I #5 Mar 16 2022 21:09:18
%S 4,46656,8916100448256,104857600000000000000000000,
%T 205891132094649000000000000000000000000000000,
%U 150130937545296572356771972164254457814047970568738777235893533016064
%N Numbers of the form m^m where m is oblong (promic).
%F a(n) = (n^2+n)^(n^2+n).
%e a(2)=46656 because we can write 46656=6^6 or 46656=6*6*6*6*6*6.
%o (PARI) a(n)=(n^2+n)^(n^2+n) \\ _Charles R Greathouse IV_, Mar 16 2022
%o (PARI) a(n)=(n*=n+1)^n \\ _Charles R Greathouse IV_, Mar 16 2022
%Y Subsequence of A000312.
%Y Oblong numbers: A002378
%Y Cf. A008973, A008974, A051674.
%K easy,nonn
%O 1,1
%A _Omar E. Pol_, Aug 24 2007
%E New name and a(5)-a(6) from _Charles R Greathouse IV_, Mar 16 2022
| 