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A346178
Expansion of (1-2*x)/(1-10*x).
0
1, 8, 80, 800, 8000, 80000, 800000, 8000000, 80000000, 800000000, 8000000000, 80000000000, 800000000000, 8000000000000, 80000000000000, 800000000000000, 8000000000000000, 80000000000000000, 800000000000000000, 8000000000000000000, 80000000000000000000
OFFSET
0,2
FORMULA
a(n) = 8*10^(n-1), n>0.
E.g.f.: (1 + 4*exp(10*x))/5. - Stefano Spezia, Jul 09 2021
PROG
(PARI) Vec((1-2*x)/(1-10*x) + O(x^20))
CROSSREFS
Cf. expansion of (1-k*x)/(1-10*x) A011557 (k=0), A196662 (k=3), A090019 (k=4), A093143 (k=5), A093141 (k=6), A093138 (k=7), A093136 (k=8).
Sequence in context: A155144 A299871 A136949 * A102592 A345081 A320759
KEYWORD
nonn,easy
AUTHOR
Felix Fröhlich, Jul 09 2021
STATUS
approved