Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum minus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
A254554
Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum minus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
Terms
- a(0) =2696a(1) =9292a(2) =34780a(3) =111443a(4) =375458a(5) =1206693a(6) =3894656a(7) =12325300a(8) =38716071a(9) =119879610a(10) =368721544a(11) =1126066489a(12) =3426457567a(13) =10392728851a(14) =31463157132a(15) =95108635680a(16) =287218972018a(17) =866713232348
External references
- oeis: A254554