Number of polyhedral graphs with n edges.

Terms

a(0) =1a(1) =0a(2) =1a(3) =2a(4) =2a(5) =4a(6) =12a(7) =22a(8) =58a(9) =158a(10) =448a(11) =1342a(12) =4199a(13) =13384a(14) =43708a(15) =144810a(16) =485704a(17) =1645576a(18) =5623571a(19) =19358410a(20) =67078828a(21) =233800162a(22) =819267086a(23) =2884908430a(24) =10204782956a(25) =36249143676a(26) =129267865144a(27) =462669746182