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A008265
Coordination sequence T1 for Zeolite Code ATO.
1
1, 4, 11, 22, 37, 59, 85, 114, 147, 184, 230, 280, 331, 386, 445, 515, 589, 662, 739, 820, 914, 1012, 1107, 1206, 1309, 1427, 1549, 1666, 1787, 1912, 2054, 2200, 2339, 2482, 2629, 2795, 2965, 3126, 3291, 3460, 3650, 3844, 4027, 4214, 4405, 4619, 4837, 5042
OFFSET
0,2
REFERENCES
W. M. Meier, D. H. Olson and Ch. Baerlocher, Atlas of Zeolite Structure Types, 4th Ed., Elsevier, 1996
FORMULA
a(5m)=57m^2+2, a(5m+1)=57m^2+24m+4, a(5m+2)=57m^2+46m+11, a(5m+3)=57m^2+68m+22, a(5m+4)=57m^2+90m+37 (N. J. A. Sloane).
G.f.: (1+x)*(1+2*x+5*x^2+6*x^3+9*x^4+11*x^5+9*x^6+6*x^7+5*x^8+2*x^9+x^10) / ((1-x)^3*(1+x+x^2+x^3+x^4)^2). - Colin Barker, Dec 19 2015
CROSSREFS
Sequence in context: A008154 A008162 A084849 * A160424 A376718 A008229
KEYWORD
nonn,easy
STATUS
approved