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A018963
Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AFR = SAPO-40 [ Si7Al29P28O128 ] . 4 TPA . OH.
0
3, 11, 44, 190, 1084, 5876, 33127, 195616, 1195351, 7647210, 50776030, 344459677, 2363407119, 16295430670, 112573797968
OFFSET
2,1
REFERENCES
G. Thimm and W. E. Klee, Zeolite cycle sequences, Zeolites, 19, pp. 422-424, 1997.
CROSSREFS
Sequence in context: A293468 A151108 A256752 * A217886 A234627 A030815
KEYWORD
nonn,more
AUTHOR
Georg Thimm (mgeorg(AT)ntu.edu.sg)
EXTENSIONS
a(11)-a(16) from Sean A. Irvine, Mar 07 2019
STATUS
approved