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A176326
a(3n) is the sequence 7, 6, 5, 4, ...; a(3n+1) is the sequence 9, 11, 13, 15, ...; a(3n+2) is the sequence 11, 8, 5, ...
0
7, 9, 11, 6, 11, 8, 5, 13, 5, 4, 15, 2, 3, 17, -1, 2, 19, -4, 1, 21, -7, 0, 23, -10, -1, 25, -13, -2, 27, -16, -3, 29, -19, -4, 31, -22, -5, 33, -25, -6, 35, -28, -7, 37, -31, -8, 39, -34, -9, 41, -37, -10, 43, -40, -11, 45, -43, -12, 47, -46
OFFSET
0,1
COMMENTS
Array read by rows in which row n lists 8-n, 2*n+7 and 14-3*n. [From Omar E. Pol, Apr 25 2010]
FORMULA
G.f. ( 7+9*x+11*x^2-8*x^3-7*x^4-14*x^5 ) / ( (x-1)^2*(1+x+x^2)^2 ). - R. J. Mathar, May 04 2013
MATHEMATICA
LinearRecurrence[{0, 0, 2, 0, 0, -1}, {7, 9, 11, 6, 11, 8}, 60] (* Harvey P. Dale, Nov 03 2016 *)
CROSSREFS
Sequence in context: A117933 A112162 A058483 * A283056 A162308 A191883
KEYWORD
sign,easy,less
AUTHOR
P. D. Vall (pdvall(AT)yahoo.com), Apr 15 2010
EXTENSIONS
Edited by Omar E. Pol and N. J. A. Sloane, Apr 24 2010
More terms from Omar E. Pol, Apr 25 2010
STATUS
approved