A073581 Factorials successively exponentiated.
1, 1, 2, 36, 48708493958471199415506599153950129703565945470976
Offset: 0
Examples
a(3) = 36 because 3!^(2!^(1!^0!)) = 36
Programs
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Mathematica
a[0] := 1 a[n_Integer] := n!^a[n - 1]
Formula
a(n) = n!^a(n - 1) starting with a(0)=0!=1.
Extensions
Edited by Henry Bottomley, Jul 13 2003
Comments