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A061505 Leading digit of n^n. 6
1, 1, 4, 2, 2, 3, 4, 8, 1, 3, 1, 2, 8, 3, 1, 4, 1, 8, 3, 1, 1, 5, 3, 2, 1, 8, 6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 3, 3, 5, 6, 8, 1, 1, 2, 3, 5, 7, 1, 1, 3, 4, 8, 1, 2, 3, 6, 1, 2, 4, 7, 1, 2, 5, 1, 2, 4, 8, 1, 3, 8, 1, 3, 8, 1, 4, 1, 2, 5, 1, 3, 7, 1, 4, 1, 2, 7, 1, 5, 1, 3, 1, 2, 7, 2, 5, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
COMMENTS
The sequence equals 2 in the range n = 3628..3730. - Rémy Sigrist, Dec 13 2018
LINKS
FORMULA
Using the formula in A000030: a(n) = [n^n / 10^([log_10(n^n)])] = [n^n / 10^([n*log_10(n)])].
EXAMPLE
a(7) = 8, as 7^7 = 823543.
MATHEMATICA
a = {}; Do[ a = Append[ a, IntegerDigits[ n^n ] [ [ 1 ] ] ], {n, 1, 75 } ]; a
PROG
(PARI) a(n) = digits(n^n)[1] \\ Rémy Sigrist, Dec 13 2018
CROSSREFS
Cf. A056849.
Sequence in context: A062072 A355849 A140395 * A255708 A197154 A275745
KEYWORD
base,nonn,easy
AUTHOR
Amarnath Murthy, May 06 2001
EXTENSIONS
More terms from Robert G. Wilson v, May 10 2001
Further terms from Asher Auel, May 20 2001
a(0) = 1 prepended by Rémy Sigrist, Dec 13 2018
STATUS
approved

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Last modified March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)