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A147725
Row sums of triangle in A147724.
1
1, 2, 10, 68, 502, 3770, 28408, 214202, 1615330, 12181748, 91867102, 692804690, 5224704088, 39401485202, 297141621850, 2240858259428, 16899166494502, 127443057596810, 961096686931768, 7247996548821002, 54659905383139570
OFFSET
0,2
FORMULA
a(n)=9*a(n-1)-11*a(n-2) for n>2, a(0)=1, a(1)=2, a(2)=10. G.f.: (1-7x+3x^2)/(1-9x+11x^2).
CROSSREFS
Sequence in context: A208561 A152620 A152621 * A074603 A110520 A136633
KEYWORD
nonn
AUTHOR
Philippe Deléham, Nov 15 2008
STATUS
approved