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Search: id:A060482
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| 1, 2, 3, 5, 9, 13, 21, 29, 45, 61, 93, 125, 189, 253, 381, 509, 765, 1021, 1533, 2045, 3069, 4093, 6141, 8189, 12285, 16381, 24573, 32765, 49149, 65533, 98301, 131069, 196605, 262141, 393213, 524285, 786429, 1048573, 1572861, 2097149, 3145725
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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Harry J. Smith, Table of n, a(n) for n=1,...,1000
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FORMULA
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a(n) = a(n-1)+2^[(n-1)/2] = 2*a(n-2)+3 = a(n-1)+A016116(n-1) = A027383(n-1)-1 = 2*A027383(n-3)+1 = 4*A052955(n-4)+1. a(2n) = 2^(n+1)-3; a(2n+1) = 3*2^n-3.
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PROGRAM
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(PARI) { for (n=1, 1000, if (n%2==0, m=n/2; a=2^(m + 1) - 3, m=(n - 1)/2; a=3*2^m - 3); if (n<3, a=n); write("b060482.txt", n, " ", a); ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 05 2009]
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CROSSREFS
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Cf. A060013, A060030.
Sequence in context: A049715 A076095 A085913 this_sequence A018138 A057225 A070819
Adjacent sequences: A060479 A060480 A060481 this_sequence A060483 A060484 A060485
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KEYWORD
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nonn
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AUTHOR
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Henry Bottomley (se16(AT)btinternet.com), Mar 19 2001
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