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Search: id:A063481
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| 2, 12, 80, 576, 4352, 33792, 266240, 2113536, 16842752, 134479872, 1074790400, 8594128896, 68736253952, 549822922752, 4398314946560, 35185445830656, 281479271677952, 2251816993554432, 18014467228958720, 144115462953762816
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Shift 2^n+1 left 2n bits.
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LINKS
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Harry J. Smith, Table of n, a(n) for n=0,...,200
Index entries for sequences related to linear recurrences with constant coefficients
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FORMULA
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G.f.: 1/(1-4*x)+1/(1-8*x). E.g.f.: e^(4*x)+e^(8*x). [From Mohammad K. Azarian (azarian(AT)evansville.edu), Jan 11 2009]
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EXAMPLE
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n=3: 23+1 shifted 2*3 bits to the left is 576 because 23+1 in binary is: [1, 0, 0, 1] and 576 is: [1, 0, 0, 1, 0, 0, 0, 0, 0, 0].
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MATHEMATICA
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Table[4^n + 8^n, {n, 0, 25}]
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PROGRAM
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(PARI) for(n=0, 22, print(shift(2^n+1, 2*n)))
(PARI) { for (n=0, 200, write("b063481.txt", n, " ", shift(1, 2*n) + shift(1, 3*n)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Aug 23 2009]
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CROSSREFS
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Cf. A000051, A034472, A052539, A034474, A062394, A034491, A062395, A062396, A007689, A063376, A074600 - A074624.
Sequence in context: A107632 A082142 A069723 this_sequence A052822 A058872 A055548
Adjacent sequences: A063478 A063479 A063480 this_sequence A063482 A063483 A063484
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KEYWORD
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easy,nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Jul 28 2001
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EXTENSIONS
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Edited by Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 25 2002
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