Number of slanted n X 5 (i=1..n) X (j=i..5+i-1) 1..4 arrays with all 1s connected, all 2s connected, all 3s connected, all 4s connected, 1 in the upper left corner, 2 in the upper right corner, 3 in the lower left corner, and 4 in the lower right corner.
A165374
Number of slanted n X 5 (i=1..n) X (j=i..5+i-1) 1..4 arrays with all 1s connected, all 2s connected, all 3s connected, all 4s connected, 1 in the upper left corner, 2 in the upper right corner, 3 in the lower left corner, and 4 in the lower right corner.
Terms
- a(0) =105a(1) =1622a(2) =11960a(3) =63740a(4) =272548a(5) =993780a(6) =3239860a(7) =9743508a(8) =27593908a(9) =74632788a(10) =194702068a(11) =493466004a(12) =1221540916a(13) =2965389012a(14) =7081701748a(15) =16678011924a(16) =38810916532a(17) =89383135572a(18) =203992087540a(19) =461842419348
External references
- oeis: A165374