OFFSET
-1,3
COMMENTS
See A054871 for definitions and key links.
EXAMPLE
a(-1)= H_5(2,-1)= 0;
a(0) = H_5(2,0) = 1;
a(1) = H_5(2,1) = 2;
a(2) = H_5(2,2) = H_4(2, H_4(2,1)) = H_4(2,2) = 2^2 = 4;
a(3) = H_5(2,3) = H_4(2, H_4(2,2)) = H_4(2,4) = 2^2^2^2 = 65536;
PROG
(Magma) [0] cat [n eq 1 select 1 else 2^Self(n-1)^(n-2): n in [1..4]]; // Vincenzo Librandi, Jan 18 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
Natan Arie Consigli, Jan 12 2016
STATUS
approved