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A008031
Coordination sequence T1 for Zeolite Code ANA.
1
1, 4, 10, 22, 39, 60, 87, 118, 154, 196, 242, 292, 345, 406, 471, 540, 616, 694, 780, 868, 959, 1060, 1161, 1270, 1384, 1500, 1626, 1750, 1881, 2020, 2159, 2308, 2458, 2614, 2778, 2940, 3111, 3286, 3465, 3652, 3840, 4036, 4236, 4438, 4647, 4860, 5079, 5302
OFFSET
0,2
FORMULA
G.f.: (1 +2*x +4*x^2 +8*x^3 +9*x^4 +11*x^5 +13*x^6 +12*x^7 +11*x^8 +11*x^9 +8*x^10 +3*x^11 +2*x^12 +3*x^13 -4*x^14 +2*x^15) / ((1 -x)^3*(1 +x^2)*(1 +x^4)*(1 +x +x^2 +x^3 +x^4)). - Colin Barker, Dec 18 2015
G.f.: (1 + 3*x + 6*x^2 + 12*x^3 + 17*x^4 + 20*x^5 + 24*x^6 + 25*x^7 + 23*x^8 + 22*x^9 + 19*x^10 + 11*x^11 + 5*x^12 + 5*x^13 - x^14 - 2*x^15 + 2*x^16) / (1-x) / (1-x^5) / (1-x^8). - Sean A. Irvine, Mar 13 2018
CROSSREFS
Sequence in context: A301077 A341734 A008255 * A339609 A008248 A301243
KEYWORD
nonn
STATUS
approved