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A057311 Coordination sequence T2 for Zeolite Code ASV. 0
1, 4, 12, 18, 26, 52, 84, 100, 118, 162, 210, 248, 284, 332, 398, 458, 510, 576, 652, 724, 798, 886, 974, 1056, 1148, 1252, 1362, 1462, 1558, 1680, 1812, 1928, 2042, 2174, 2318, 2456, 2592, 2736, 2890, 3046, 3198, 3364, 3536, 3696, 3866, 4054, 4242 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..46.

R. W. Grosse-Kunstleve, Coordination Sequences and Encyclopedia of Integer Sequences

International Zeolite Association, Database of Zeolite Structures

FORMULA

Empirical g.f.: (1 +x)*(1 +2*x +7*x^2 +x^3 +12*x^4 +10*x^5 +18*x^6 -x^7 +11*x^8 -4*x^9 +5*x^10 -4*x^11 +2*x^12) / ((1 -x)^3*(1 +x^2)*(1 +x +x^2)*(1 +x +x^2 +x^3 +x^4)). - Colin Barker, Dec 20 2015

CROSSREFS

Sequence in context: A078514 A230628 A074285 * A063679 A075867 A071929

Adjacent sequences:  A057308 A057309 A057310 * A057312 A057313 A057314

KEYWORD

nonn

AUTHOR

R. W. Grosse-Kunstleve (rwgk(AT)cci.lbl.gov)

STATUS

approved

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Last modified February 22 13:55 EST 2018. Contains 299454 sequences. (Running on oeis4.)