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A048468
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a(n) = T(7,n), array T given by A047858.
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1
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1, 9, 26, 62, 138, 298, 634, 1338, 2810, 5882, 12282, 25594, 53242, 110586, 229370, 475130, 983034, 2031610, 4194298, 8650746, 17825786, 36700154, 75497466, 155189242, 318767098, 654311418, 1342177274, 2751463418
(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..3000
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FORMULA
| a(n) = 2^(n-1)*(n+14)-6. a(0)=1, a(1)=9, a(2)=26, a(n) = 5*a(n-1)-8*a(n-2)+4*a(n-3). - Vincenzo Librandi, Sep 28 2011
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PROG
| (MAGMA) [2^(n-1)*(n+14)-6: n in [0..30]]; // Vincenzo Librandi, Sep 28 2011
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CROSSREFS
| n-th difference of a(n), a(n-1), ..., a(0) is (8, 9, 10, ...).
Sequence in context: A081267 A052153 A154560 * A048771 A055849 A084813
Adjacent sequences: A048465 A048466 A048467 * A048469 A048470 A048471
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KEYWORD
| nonn,easy
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AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu)
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