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A057313
Coordination sequence T2 for Zeolite Code SAS.
1
1, 4, 9, 17, 30, 48, 68, 87, 109, 142, 184, 224, 255, 287, 338, 406, 470, 515, 555, 620, 712, 802, 865, 915, 992, 1104, 1218, 1301, 1365, 1456, 1586, 1720, 1821, 1901, 2010, 2160, 2312, 2427, 2521, 2650, 2824, 2996, 3123, 3227, 3374, 3574, 3770, 3911
OFFSET
0,2
FORMULA
G.f.: (1 + x) * (1 + x + 2*x^2 + 4*x^3 + 6*x^4 + 5*x^5 + 6*x^6 + 5*x^7 + 6*x^8 + 4*x^9 + 2*x^10 + x^11 + x^12) / ((1 - x)^3 * (1 - x + x^2) * (1 + x + x^2 + x^3 + x^4)^2). - Colin Barker, Dec 20 2015
CROSSREFS
Sequence in context: A265049 A266333 A008225 * A008127 A008082 A008143
KEYWORD
nonn
STATUS
approved