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A144619
a(n) = 19n + 8.
2
8, 27, 46, 65, 84, 103, 122, 141, 160, 179, 198, 217, 236, 255, 274, 293, 312, 331, 350, 369, 388, 407, 426, 445, 464, 483, 502, 521, 540, 559, 578, 597, 616, 635, 654, 673, 692, 711, 730, 749, 768, 787, 806, 825, 844, 863, 882, 901, 920, 939, 958, 977, 996
OFFSET
0,1
FORMULA
G.f.: (11*x+8)/(1-x)^2. - Vincenzo Librandi, May 14 2012
a(n) = 2*a(n-1) - a(n-2). - Vincenzo Librandi, May 14 2012
MATHEMATICA
Range[8, 1500, 19] (* Vladimir Joseph Stephan Orlovsky, Jun 01 2011 *)
CoefficientList[Series[(8+11*x)/(x-1)^2, {x, 0, 60}], x] (* Vincenzo Librandi, May 14 2012 *)
LinearRecurrence[{2, -1}, {8, 27}, 60] (* Harvey P. Dale, Jun 17 2020 *)
PROG
(Magma) I:=[8, 27]; [n le 2 select I[n] else 2*Self(n-1)-Self(n-2): n in [1..60]]; // Vincenzo Librandi, May 14 2012
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Jan 15 2009
EXTENSIONS
Offset corrected by Jon E. Schoenfield, Jun 17 2010
STATUS
approved