A018979 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite APD = AlPO4-D [Al16P16O64] starting from a T2 atom.

1, 11, 23, 170, 1081, 6673, 43084, 275081, 1851148, 12573215, 86880021, 606290719, 4278004277, 30455293018, 218512831477

Offset

2,2

Links

Table of n, a(n) for n=2..16.

Georg Thimm, Cycle sequences of crystal structures.

Georg Thimm, Personal website (archived).

Georg Thimm, A graph theoretical approach to the analysis, comparison, and enumeration of crystal structures, Dissertation, Goethe University Frankfurt, Germany, 2008.

Georg Thimm and W. E. Klee, Zeolite cycle sequences, Zeolites, 19(5-6) (1997), 422-424.

Crossrefs

Sequence in context: A171068 A091465 A261352 * A181147 A059327 A042005

Adjacent sequences: A018976 A018977 A018978 * A018980 A018981 A018982

Keyword

nonn,more

Author

Georg Thimm (mgeorg(AT)ntu.edu.sg)

Extensions

a(11)-a(16) from Sean A. Irvine, Mar 12 2019

Status

approved