A225500 Expansion of 1/(1 - x - x^5 + x^6 - x^7 - x^11 + x^12).
1, 1, 1, 1, 1, 2, 2, 3, 4, 5, 7, 9, 12, 15, 19, 25, 33, 43, 56, 73, 95, 124, 161, 210, 273, 355, 463, 603, 786, 1023, 1332, 1735, 2259, 2942, 3831, 4989, 6497, 8461, 11019, 14350, 18687, 24335, 31691, 41270, 53745
Offset: 0
Links
- G. C. Greubel, Table of n, a(n) for n = 0..1000
- Index entries for linear recurrences with constant coefficients, signature (1,0,0,0,1,-1,1,0,0,0,1,-1).
Programs
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Mathematica
CoefficientList[Series[1/(1 - x - x^5 + x^6 - x^7 - x^11 + x^12), {x, 0, 50}], x] LinearRecurrence[{1,0,0,0,1,-1,1,0,0,0,1,-1},{1,1,1,1,1,2,2,3,4,5,7,9},100] (* G. C. Greubel, Nov 16 2016 *) -
PARI
Vec(1/(1-x -x^5 +x^6 -x^7 -x^11 +x^12) + O(x^50)) \\ G. C. Greubel, Nov 16 2016