A364271 Initial digit of n^((n + 1)^(n + 2)).
0, 1, 2, 3, 1, 7, 1, 7, 2, 8, 1, 1, 1, 2, 7, 1, 9, 1, 2, 2, 4, 5, 1, 7, 3, 2, 4, 1, 2, 6, 2, 1, 2, 2, 1, 8, 1, 6, 1, 5, 2, 8, 8, 3, 9, 3, 4, 2, 4, 3, 1, 6, 2, 1, 6, 6, 9, 1, 9, 2, 5, 2, 9, 9, 6, 8, 4, 2, 7, 7, 6, 1, 2, 2, 3, 1, 2, 6, 1, 1, 6, 1, 1, 2, 3, 5, 1
Offset: 0
Examples
a(2) = 2, since 2^((2 + 1)^(2 + 2)) = 2417851639229258349412352.
Links
- Kevin Ryde, C code using MPFR
Programs
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C
/* See links */
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Mathematica
Join[{0}, Table[Floor[n^((n+1)^(n+2))/10^Floor[Log10[n^((n+1)^(n+2))]]], {n, 86}]]
Formula
Extensions
More terms from Kevin Ryde, Oct 27 2023