A038176 A038175/2.

0, 1, 6, 27, 128, 572, 2560, 11248, 49152

Offset

2,3

References

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.

Links

Table of n, a(n) for n=2..10.

B. N. Cyvin et al., Isomer enumeration of unbranched catacondensed polygonal systems with pentagons and heptagons, 1996 [Annotated scanned copy of pages 118, 119 only].

Crossrefs

Cf. A038175.

Sequence in context: A360057 A377263 A109115 * A104745 A184279 A299598

Adjacent sequences: A038173 A038174 A038175 * A038177 A038178 A038179

Keyword

nonn,more

Author

N. J. A. Sloane

Status

approved