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%I #6 Feb 09 2019 08:38:48
%S 0,1,6,27,128,572,2560,11248,49152
%N A038175/2.
%D B. N. Cyvin et al., Isomer enumeration of unbranched catacondensed polygonal systems with pentagons and heptagons, Match, No. 34 (Oct 1996), pp. 109-121. See Table 5.
%H B. N. Cyvin et al., <a href="/A323850/a323850.png">Isomer enumeration of unbranched catacondensed polygonal systems with pentagons and heptagons</a>, 1996 [Annotated scanned copy of pages 118, 119 only].
%Y Cf. A038175.
%K nonn,more
%O 2,3
%A _N. J. A. Sloane_.