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A008258
Coordination sequence T1 for Moganite.
1
1, 4, 10, 24, 40, 64, 90, 120, 160, 200, 244, 300, 354, 412, 484, 552, 624, 712, 794, 880, 984, 1080, 1180, 1300, 1410, 1524, 1660, 1784, 1912, 2064, 2202, 2344, 2512, 2664, 2820, 3004, 3170, 3340, 3540, 3720, 3904, 4120, 4314, 4512, 4744, 4952, 5164, 5412
OFFSET
0,2
REFERENCES
Inorganic Crystal Structure Database: Collection Code 67669.
FORMULA
a(3*m) = 22*m^2+2, a(3*m+1) = 22*m^2+14*m+4, a(3*m+2) = 22*m^2+30*m+12, m>0. - N. J. A. Sloane
G.f.: (1+3*x+6*x^2+12*x^3+10*x^4+12*x^5-x^6+x^7-2*x^8+2*x^9) / ((1-x)^3*(1+x+x^2)^2). - Colin Barker, Dec 23 2015
CROSSREFS
Sequence in context: A102549 A277789 A274019 * A008251 A174934 A083168
KEYWORD
nonn,easy
STATUS
approved