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10, 64, 442, 3088, 21610, 151264, 1058842, 7411888, 51883210, 363182464, 2542277242, 17795940688, 124571584810, 872001093664, 6104007655642, 42728053589488, 299096375126410, 2093674625884864, 14655722381194042, 102590056668358288
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refs;
listen;
history;
text;
internal format)
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OFFSET
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0,1
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LINKS
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FORMULA
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a(n) = 7*a(n-1)-6.
a(n) = 8*a(n-1)-7*a(n-2).
G.f.: 2*(5-8*x)/((1-x)*(1-7*x)).
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MATHEMATICA
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(9*7^Range[0, 20])+1 (* or *) LinearRecurrence[{8, -7}, {10, 64}, 20] (* Harvey P. Dale, May 10 2014 *)
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PROG
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(Magma) [9*7^n+1: n in [0..30]];
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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