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1, 12, 23, 34, 45, 56, 67, 78, 89, 100, 111, 122, 133, 144, 155, 166, 177, 188, 199, 210, 221, 232, 243, 254, 265, 276, 287, 298, 309, 320, 331, 342, 353, 364, 375, 386, 397, 408, 419, 430, 441, 452, 463, 474, 485, 496, 507, 518, 529, 540, 551, 562, 573, 584, 595, 606, 617, 628, 639, 650, 661
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Let A be the Hessenberg matrix of order n, defined by: A[1,j]=1, A[i,i]:=11, (i>1), A[i,i-1]=-1, and A[i,j]=0 otherwise. Then, for n>=2, a(n-1)=-charpoly(A,x^(n-1)). [From Milan R. Janjic (agnus(AT)blic.net), Feb 21 2010]
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..10000
Tanya Khovanova, Recursive Sequences
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EXAMPLE
| G.f.: (1+10*x)/(1-x)^2.
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MATHEMATICA
| Range[1, 1000, 11] (* From Vladimir Joseph Stephan Orlovsky, May 28 2011 *)
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PROG
| (MAGMA) [11*n+1: n in [0..60]]; // Vincenzo Librandi, Jul 30 2011
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CROSSREFS
| Cf. A008593, A017281, A017413.
Sequence in context: A029756 A104340 A136414 * A004960 A098953 A072485
Adjacent sequences: A017398 A017399 A017400 * A017402 A017403 A017404
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KEYWORD
| nonn,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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