Number of n X 1 (-1,0,1) arrays of determinants of 2 X 2 subblocks of some (n+1) X 2 binary array.
A226710
Number of n X 1 (-1,0,1) arrays of determinants of 2 X 2 subblocks of some (n+1) X 2 binary array.
Terms
- a(0) =3a(1) =9a(2) =25a(3) =67a(4) =181a(5) =491a(6) =1331a(7) =3607a(8) =9775a(9) =26491a(10) =71793a(11) =194565a(12) =527287a(13) =1428991a(14) =3872683a(15) =10495289a(16) =28443095a(17) =77083123a(18) =208901593a(19) =566140471a(20) =1534287165a(21) =4158044205a(22) =11268641233a(23) =30538943065a(24) =82763043409a(25) =224294643719
External references
- oeis: A226710