%I #9 Jul 31 2019 11:30:52
%S 0,0,0,1,20,274,3224,35119,366152,3717126,37101780,366240435,
%T 3588644268,34989880068,340028122980,3297155317612,31927270515392,
%U 308907360676012,2987556153506904,28890414890866473,279405472916899476,2702885116291760036,26156597304381215188
%N Related to enumeration of rooted catapolyoctagons (see Cyvin reference for precise definition).
%D S. J. Cyvin, B. N. Cyvin, and J. Brunvoll. Enumeration of tree-like octagonal systems: catapolyoctagons, ACH Models in Chem. 134 (1997), 55-70, Table III, Y_r.
%F a(n) = Sum_{i=1..n-3} A036758(i)*A121116(n-i) [Cyvin eq. (20)] . - _R. J. Mathar_, Jul 31 2019
%K nonn
%O 1,5
%A _N. J. A. Sloane_, Aug 13 2006
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