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A036548
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a(n) = T(7,n), array T given by A048471.
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2
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1, 129, 513, 1665, 5121, 15489, 46593, 139905, 419841, 1259649, 3779073, 11337345, 34012161, 102036609, 306109953, 918329985, 2754990081, 8264970369, 24794911233, 74384733825, 223154201601, 669462604929, 2008387814913
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index to sequences with linear recurrences with constant coefficients, signature (4,-3).
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FORMULA
| a(n) = 64*3^n - 63. - Ralf Stephan, Feb 17 2004
Contribution from Vincenzo Librandi, Nov 11 2011 (Start)
a(n) = 3*a(n-1)+126.
a(n) = 4*a(n-1)-3*a(n-2).
G.f.: (1+125*x)/((1-x)*(1-3*x)). (End)
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PROG
| (MAGMA) [64*3^n-63: n in [0..30]]; // Vincenzo Librandi, Nov 11 2011
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CROSSREFS
| n-th difference of a(n), a(n-1), ..., a(0) is 2^(n+6) for n=1, 2, 3...
Sequence in context: A034072 A157951 A043383 * A046286 A088719 A034681
Adjacent sequences: A036545 A036546 A036547 * A036549 A036550 A036551
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KEYWORD
| nonn,easy
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AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu)
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