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A018996
Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite BPH = Beryllophosphate-H Na7K7 [ Be14P14O56 ] . 20 H2O.
0
3, 9, 52, 291, 1445, 6420, 32959, 187727, 1102665, 6930612, 46522650, 320194002, 2204132941, 15091491681, 102924219886
OFFSET
2,1
REFERENCES
G. Thimm and W. E. Klee, Zeolite cycle sequences, Zeolites, 19, pp. 422-424, 1997.
CROSSREFS
Cf. A018966. [R. J. Mathar, Oct 26 2008]
Sequence in context: A319105 A106329 A193521 * A018966 A109933 A018477
KEYWORD
nonn,more
AUTHOR
Georg Thimm (mgeorg(AT)ntu.edu.sg)
EXTENSIONS
a(11)-a(16) from Sean A. Irvine, Mar 17 2019
STATUS
approved