A019138 - OEIS

%I #10 Apr 08 2019 03:41:57

%S 0,2,3,6,12,23,26,108,196,457,1194,2941,6996,18466,44700,115222,

%T 290209,743380,1902091,4927667,12687155,33111341,86087218,225487899,

%U 590898052,1554720401,4094006743,10817803375,28602497093

%N Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite HEU = Heulandite Ca4 [ Al8Si28O72 ] . 24 H2O.

%D G. Thimm and W. E. Klee, Zeolite cycle sequences, Zeolites, 19, pp. 422-424, 1997.

%H G. Thimm, <a href="/thimm1.html">Cycle sequences of crystal structures</a>

%K nonn,more

%O 3,2

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

%E a(20)-a(31) from _Sean A. Irvine_, Apr 08 2019