Number of slanted n X 4 (i=1..n) X (j=i..4+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, 4 in the lower right corner, and with no element having more than 3 neighbors with the same value.
A165381
Number of slanted n X 4 (i=1..n) X (j=i..4+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, 4 in the lower right corner, and with no element having more than 3 neighbors with the same value.
Terms
- a(0) =37a(1) =285a(2) =1012a(3) =2467a(4) =4708a(5) =7748a(6) =11588a(7) =16228a(8) =21668a(9) =27908a(10) =34948a(11) =42788a(12) =51428a(13) =60868a(14) =71108a(15) =82148a(16) =93988a(17) =106628a(18) =120068a(19) =134308a(20) =149348a(21) =165188a(22) =181828a(23) =199268a(24) =217508a(25) =236548a(26) =256388a(27) =277028a(28) =298468a(29) =320708
External references
- oeis: A165381