Number of vertex cuts in the n-gear graph.

Terms

a(0) =1a(1) =5a(2) =51a(3) =293a(4) =1383a(5) =6017a(6) =25315a(7) =104941a(8) =431775a(9) =1768377a(10) =7218555a(11) =29388325a(12) =119381239a(13) =484031537a(14) =1959295251a(15) =7919693789a(16) =31972642767a(17) =128937189161a(18) =519476334379