Number of matchings in the 2 X n rook graph P_2 X K_n.
A270229
Number of matchings in the 2 X n rook graph P_2 X K_n.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =32a(4) =193a(5) =1382a(6) =11719a(7) =112604a(8) =1221889a(9) =14639786a(10) =192949639a(11) =2760749048a(12) =42732172993a(13) =709490574158
External references
- oeis: A270229