Number of tilings of a 4 X n rectangle using V (2m+1)-ominoes (m >= 0) in standard orientation.

A322497

Number of tilings of a 4 X n rectangle using V (2m+1)-ominoes (m >= 0) in standard orientation.

Terms

    a(0) =1a(1) =1a(2) =5a(3) =18a(4) =68a(5) =233a(6) =838a(7) =2989a(8) =10687a(9) =38097a(10) =136002a(11) =485370a(12) =1732377a(13) =6182628a(14) =22065919a(15) =78752901a(16) =281068809a(17) =1003130814a(18) =3580164896a(19) =12777572157a(20) =45603031014a(21) =162756761629a(22) =580877276331

External references