A138029 Main diagonal of A138028; the most significant digit of n^(n-1).

1, 2, 9, 6, 6, 7, 1, 2, 4, 1, 2, 7, 2, 7, 2, 1, 4, 2, 1, 5, 2, 1, 9, 5, 3, 2, 1, 1, 8, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 3, 3, 3, 4, 4, 5, 6, 8, 1, 1, 1, 2, 3, 4, 6, 9, 1, 2, 3, 5, 8, 1, 2, 3, 6, 1, 1, 3, 5, 1, 2, 3, 7, 1, 2, 5, 1, 2, 4, 1, 2, 4, 1, 2, 5, 1, 2, 6, 1, 3, 8, 2, 5, 1, 3, 8, 2, 5, 1, 3, 1, 2, 7, 2, 5, 1

Offset

1,2

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Maple

f:= n -> floor(10^frac((n-1)*log[10](n))):
map(f, [$1..200]); # Robert Israel, Jan 15 2019

Mathematica

f[n_, k_] := Quotient[n^k, 10^Floor[k*Log[10, n]]]; Table[ f[ n, n - 1], {n, 105}]

Crossrefs

Cf. A061505, A138028.

Sequence in context: A010598 A152564 A318523 * A146481 A233766 A021341

Adjacent sequences: A138026 A138027 A138028 * A138030 A138031 A138032

Keyword

base,nonn

Author

Robert G. Wilson v, Feb 10 2008

Extensions

Name corrected by Robert Israel, Jan 15 2019

Status

approved