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A008085
Coordination sequence T2 for Zeolite Code EDI.
1
1, 4, 8, 18, 32, 52, 74, 100, 128, 162, 204, 244, 286, 340, 396, 450, 512, 580, 650, 724, 800, 882, 972, 1060, 1150, 1252, 1356, 1458, 1568, 1684, 1802, 1924, 2048, 2178, 2316, 2452, 2590, 2740, 2892, 3042, 3200, 3364, 3530, 3700, 3872, 4050, 4236, 4420
OFFSET
0,2
REFERENCES
W. M. Meier, D. H. Olson and Ch. Baerlocher, Atlas of Zeolite Structure Types, 4th Ed., Elsevier, 1996
FORMULA
a(12*m+k) = 288*m^2 + 48*k*m + [ -2, 4, 12, 18, 32, 52, 74, 100, 128, 162, 204, 244 ], 0<=k<12. - N. J. A. Sloane
G.f.: (1+2*x+2*x^2+7*x^3+3*x^4+10*x^5-2*x^6+5*x^7-8*x^8+4*x^9) / ((1-x)^3 * (1+x^2) * (1+x+x^2)). - Colin Barker, Dec 20 2015
CROSSREFS
Sequence in context: A365675 A195334 A009918 * A001977 A008373 A008374
KEYWORD
nonn,easy
STATUS
approved