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A018962
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, 41, 169, 978, 5369, 31352, 189377, 1176219, 7639579, 51289700, 349864063, 2402860362, 16545424606, 114072082438
OFFSET
2,1
REFERENCES
G. Thimm and W. E. Klee, Zeolite cycle sequences, Zeolites, 19, pp. 422-424, 1997.
CROSSREFS
Sequence in context: A151087 A149066 A149067 * A102417 A358426 A096147
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