(OEIS A002216; Harary and Read 1970, Cyvin et al. 1993)。
多六邊形也可以根據幾何平面性（稱為非螺旋烯）或幾何非平面性（稱為螺旋烯）進行分類。富森包括螺旋烯。
下表給出了 -六邊形富森（Brinkmann et al. 2002, 2003），鏈狀富森（Harary and Read 1970, Beinecke and Pippert 1974, Knop et al. 1984, Cyvin et al. 1993），鏈狀富森，平面鏈狀富森和簡單鏈狀富森的數量。
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."
。那麼鏈狀富森（或線型稠合富森）具有 
（因此也稱為“樹狀”），而周狀富森（或周稠合富森）具有 
。由 
個多六邊形組成的鏈狀富森的數量有時被稱為 Harary-Read 數，並具有令人印象深刻的生成函式![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)
-六邊形富森（Brinkmann et al. 2002, 2003），鏈狀富森（Harary and Read 1970, Beinecke and Pippert 1974, Knop et al. 1984, Cyvin et al. 1993），鏈狀富森，平面鏈狀富森和簡單鏈狀富森的數量。
