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A085708 Arithmetic derivative of 10^n. 4
0, 7, 140, 2100, 28000, 350000, 4200000, 49000000, 560000000, 6300000000, 70000000000, 770000000000, 8400000000000, 91000000000000, 980000000000000, 10500000000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

a(n) = A003415(A011557(n)) = A008589(n)*A011557(n-1).

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..100

FORMULA

a(n) = 7*n*10^(n-1).

PROG

(MAGMA) [7*n*10^(n-1): n in [0..20]]; // Vincenzo Librandi, Jun 09 2011

CROSSREFS

Cf. A001787, A027471.

Sequence in context: A126156 A082162 A238692 * A054606 A191956 A215042

Adjacent sequences:  A085705 A085706 A085707 * A085709 A085710 A085711

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Jul 19 2003

STATUS

approved

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Last modified October 31 03:51 EDT 2014. Contains 248845 sequences.