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5, 41, 293, 2057, 14405, 100841, 705893, 4941257, 34588805, 242121641, 1694851493, 11863960457, 83047723205, 581334062441, 4069338437093, 28485369059657, 199397583417605, 1395783083923241, 9770481587462693, 68393371112238857
(list;
graph;
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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Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (8,-7).
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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), n>1.
G.f. ( 5+x ) / ( (7*x-1)*(x-1) ). - R. J. Mathar, Oct 30 2011
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PROG
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(MAGMA) [6*7^n-1: n in [0..30]]
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CROSSREFS
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Cf. A048473, A081655, A198480, A198647.
Sequence in context: A155455 A218349 A154577 * A337285 A349541 A202249
Adjacent sequences: A198685 A198686 A198687 * A198689 A198690 A198691
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KEYWORD
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nonn,easy
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AUTHOR
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Vincenzo Librandi, Oct 29 2011
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STATUS
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approved
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