(OEIS A002216; Harary and Read 1970, Cyvin et al. 1993)。
多六边形也可以根据几何平面性（称为非螺旋烯）或几何非平面性（称为螺旋烯）进行分类。富森包括螺旋烯。
下表给出了 -六边形富森（Brinkmann et al. 2002, 2003），链状富森（Harary and Read 1970, Beinecke and Pippert 1974, Knop et al. 1984, Cyvin et al. 1993），链状富森，平面链状富森和简单链状富森的数量。
Beineke, L. W. and Pippert, R. E. "On the Enumeration of Planar Trees of Hexagons." Glasgow Math. J.15, 131-147, 1974.Brinkmann, G.; Caporossi, G.; and Hansen, P. "A Constructive Enumeration of Fusenes and Benzenoids." J. Algorithms.45, 155-166, 2002.Brinkmann, G.; Caporossi, G.; and Hansen, P. "A Survey and New Results on Computer Enumeration of Polyhex and Fusene Hydrocarbons." J. Chem. Inf. Comput. Sci.43, 842-851, 2003.Cyvin, S. J.; Brunvoll, J.; Xiaofeng, G.; and Fuji, Z. "Number of Perifusenes with One Internal Vertex." Rev. Roumaine Chem.38, 65-77, 1993.Harary, F. and Read, R. C. "The Enumeration of Tree-Like Polyhexes." Proc. Edinburgh Math. Soc.17, 1-13, 1970.Knop, J. V.; Szymanski, K.; Jeričević, Ž.; and Trinajstić, N. "On the Total Number of Polyhexes." Match: Commun. Math. Chem., No. 16, 119-134, Aug. 1984.Sloane, N. J. A. Sequences A002216/M1426, A018190, A038142, and A108070 in "The On-Line Encyclopedia of Integer Sequences."
。那么链状富森（或线型稠合富森）具有 
（因此也称为“树状”），而周状富森（或周稠合富森）具有 
。由 
个多六边形组成的链状富森的数量有时被称为 Harary-Read 数，并具有令人印象深刻的生成函数![H(x)=1/(24)x^(-2){12+24x+48x^2-24x^3+[(1-x)(1-5x)]^(3/2)-3(5x+3)sqrt((1-x^2)(1-5x^2))-4sqrt((1-x^3)(1-5x^3))}-4
=x+x^2+2x^3+5x^4+12x^5+37x^6+...](/images/equations/Fusene/NumberedEquation1.svg)
-六边形富森（Brinkmann et al. 2002, 2003），链状富森（Harary and Read 1970, Beinecke and Pippert 1974, Knop et al. 1984, Cyvin et al. 1993），链状富森，平面链状富森和简单链状富森的数量。
