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A060073 a(n) = (n^(n-1)-1)/(n-1)^2. 10
1, 2, 7, 39, 311, 3268, 42799, 672605, 12345679, 259374246, 6140565047, 161792257795, 4696537119847, 148943500129544, 5124095576030431, 190082780764323705, 7563707819165039903, 321380710796022350410 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

COMMENTS

Written in base n, a(n) has n-2 digits and looks like 12345... except that the final digit is n-1 rather than n-2.

LINKS

Harry J. Smith, Table of n, a(n) for n = 2..200

Index entries for sequences related to final digits of numbers

FORMULA

a(n) = A037205(n-1)/(n-1)^2 = A060072(n)/(n-1) = A058128(n)/n = A059522(n)/A000142(n).

EXAMPLE

a(10) = 999999999/81 = 111111111/9 = 12345679.

PROG

(PARI) { for (n=2, 200, write("b060073.txt", n, " ", (n^(n - 1) - 1)/(n - 1)^2); ) } \\ Harry J. Smith, Jul 01 2009

CROSSREFS

Sequence in context: A032118 A125660 A112944 * A322152 A187806 A300519

Adjacent sequences:  A060070 A060071 A060072 * A060074 A060075 A060076

KEYWORD

nonn

AUTHOR

Henry Bottomley, Feb 21 2001

STATUS

approved

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Last modified November 20 20:40 EST 2019. Contains 329347 sequences. (Running on oeis4.)