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 A171881 Square array, read by antidiagonals, where T(n,k)=n^^k for n>=0, k>=1. 1
 0, 1, 1, 2, 1, 1, 3, 4, 1, 1, 4, 27, 16, 1, 1, 5, 256, 19683, 256, 1, 1, 6, 3125, 4294967296, 7625597484987, 65536, 1, 1, 7, 46656, 298023223876953125, 340282366920938463463374607431768211456 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 COMMENTS n^^k is defined the left-associative way: n^^2=n^n, n^^3=(n^n)^n=n^(n^2), n^^4=((n^n)^n)^n=n^(n^3), and in general n^^k=n^(n^(k-1)). More terms on Munafo website. Array begins: 0,1,1,1,1,1,... 1,1,1,1,1,1,... 2,4,16,256,65536,... 3,27,19683,... 4,256,4294967296,... 5,3125,... 6,46656,... LINKS R. Munafo, Hyper4 Iterated Exponential Function CROSSREFS Cf. A171882. Sequence in context: A104495 A093541 A336187 * A321877 A320251 A210341 Adjacent sequences:  A171878 A171879 A171880 * A171882 A171883 A171884 KEYWORD nonn,tabl AUTHOR Robert Munafo, Jan 21 2010 STATUS approved

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Last modified May 11 21:35 EDT 2021. Contains 343808 sequences. (Running on oeis4.)