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A047473
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Numbers that are congruent to {2, 3} mod 8.
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1
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2, 3, 10, 11, 18, 19, 26, 27, 34, 35, 42, 43, 50, 51, 58, 59, 66, 67, 74, 75, 82, 83, 90, 91, 98, 99, 106, 107, 114, 115, 122, 123, 130, 131, 138, 139, 146, 147, 154, 155, 162, 163, 170, 171, 178, 179, 186, 187, 194, 195, 202, 203, 210, 211, 218, 219, 226, 227, 234
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| n such that n and n+2 have the same digital binary sum - Benoit Cloitre (benoit7848c(AT)orange.fr), Dec 01 2002
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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (1,1,-1).
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FORMULA
| a(n)=8*n-a(n-1)-11 (with a(1)=2) [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 06 2010]
a(n)=4*n-7/2-3*(-1)^n/2. G.f. x*(2+x+5*x^2) / ( (1+x)*(x-1)^2 ). - R. J. Mathar, Oct 08 2011
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EXAMPLE
| For n=2, a(2)=8*2-2-11=3; n=4, a(4)=8*4-3-11=10; n=4, a(4)=8*4-10-11=11 [From Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 06 2010]
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CROSSREFS
| Sequence in context: A146327 A081706 A032804 * A008509 A081868 A193652
Adjacent sequences: A047470 A047471 A047472 * A047474 A047475 A047476
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| More terms from Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Aug 06 2010
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