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A037494 Base 9 digits are, in order, the first n terms of the periodic sequence with initial period 2,1. 0
2, 19, 173, 1558, 14024, 126217, 1135955, 10223596, 92012366, 828111295, 7453001657, 67077014914, 603693134228, 5433238208053, 48899143872479, 440092294852312, 3960830653670810 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
a(n) = 9*a(n-1) + a(n-2) - 9*a(n-3).
G.f.: x*(2+x)/((1-9*x)*(1-x^2)). a(n) = (19*9^n-4*(-1)^n-15)/80. - Bruno Berselli, Jan 20 2011
CROSSREFS
Sequence in context: A037735 A224753 A037558 * A037574 A037742 A037637
KEYWORD
nonn,base,easy
AUTHOR
STATUS
approved

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Last modified March 28 10:55 EDT 2024. Contains 371241 sequences. (Running on oeis4.)