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18, 45, 72, 99, 126, 153, 180, 207, 234, 261, 288, 315, 342, 369, 396, 423, 450, 477, 504, 531, 558, 585, 612, 639, 666, 693, 720, 747, 774, 801, 828, 855, 882, 909, 936, 963, 990, 1017, 1044, 1071, 1098, 1125, 1152, 1179, 1206, 1233, 1260, 1287, 1314, 1341
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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COMMENTS
| Second differences of dodecahedral numbers (A006566).
Also, first differences of dodecahedral gnomic numbers (A093485); a(n+1) - a(n) = 27.
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..10000
Tanya Khovanova, Recursive Sequences
Index to sequences with linear recurrences with constant coefficients, signature (2,-1).
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FORMULA
| a(n) = 9*A016789(n).
G.f.: ( 18+9*x ) / (x-1)^2 . - R. J. Mathar, Jul 02 2011
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MATHEMATICA
| Range[18, 7000, 27] (* From Vladimir Joseph Stephan Orlovsky, Jul 13 2011 *)
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PROG
| (MAGMA) [27*n+18: n in [0..50]]; // Vincenzo Librandi, Sep 29 2011
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CROSSREFS
| Sequence in context: A095739 A055577 A002798 * A179896 A075284 A057444
Adjacent sequences: A124385 A124386 A124387 * A124389 A124390 A124391
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KEYWORD
| nonn,easy
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AUTHOR
| Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 30 2006
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