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A008239
Coordination sequence T2 for Zeolite Code THO.
1
1, 4, 9, 19, 33, 50, 74, 100, 129, 165, 201, 242, 290, 338, 393, 453, 513, 580, 650, 722, 801, 883, 969, 1060, 1154, 1252, 1353, 1459, 1569, 1682, 1802, 1924, 2049, 2181, 2313, 2450, 2594, 2738, 2889, 3045, 3201, 3364, 3530, 3698, 3873, 4051, 4233, 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(24*m+k) = 1152*m^2 + 96*k*m + one of 24 numbers depending on k, 0<=k<24. - N. J. A. Sloane
G.f.: (1+x)*(1+x^2)^2*(1+x-x^2+x^3+x^4) / ((1-x)^3*(1+x+x^2)*(1+x^4)). - Colin Barker, Dec 20 2015
CROSSREFS
Sequence in context: A086733 A254100 A365801 * A038403 A009856 A009920
KEYWORD
nonn,easy
STATUS
approved