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A047411
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Numbers that are congruent to {1, 2, 4, 6} mod 8.
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1
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1, 2, 4, 6, 9, 10, 12, 14, 17, 18, 20, 22, 25, 26, 28, 30, 33, 34, 36, 38, 41, 42, 44, 46, 49, 50, 52, 54, 57, 58, 60, 62, 65, 66, 68, 70, 73, 74, 76, 78, 81, 82, 84, 86, 89, 90, 92, 94, 97, 98, 100, 102, 105, 106, 108, 110, 113, 114, 116, 118, 121, 122, 124, 126, 129, 130
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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FORMULA
| a(n) = a(n-4)+8. O.g.f.: 2/(-1+x)^2+1/[2(x^2+1)]+7/[4(-1+x)]+1/[4(x+1)] . - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Mar 10 2008
a(n)=a(n-1)+a(n-4)-a(n-5). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 11 2010]
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MAPLE
| A047411 := proc(n) if n <= 4 then op(n, [1, 2, 4, 6]) ; else procname(n-4)+8 ; end if; end proc: seq(A047411(n), n=1..100) ; [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 11 2010]
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CROSSREFS
| Sequence in context: A162202 A156165 A024968 * A138972 A050110 A184416
Adjacent sequences: A047408 A047409 A047410 * A047412 A047413 A047414
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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
| Extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 11 2010
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