Number of 3 X n integer matrices (m_{i,j}) such that m_{1,1}=0, m_{3,n}=2, and all rows, columns, and falling diagonals are (weakly) monotonic without jumps of 2.
A323967
Number of 3 X n integer matrices (m_{i,j}) such that m_{1,1}=0, m_{3,n}=2, and all rows, columns, and falling diagonals are (weakly) monotonic without jumps of 2.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =25a(4) =94a(5) =266a(6) =632a(7) =1332a(8) =2570a(9) =4631a(10) =7900a(11) =12883a(12) =20230a(13) =30760a(14) =45488a(15) =65654a(16) =92754a(17) =128573a(18) =175220a(19) =235165a(20) =311278a(21) =406870a(22) =525736a(23) =672200a(24) =851162a(25) =1068147a(26) =1329356a(27) =1641719a(28) =2012950a(29) =2451604
External references
- oeis: A323967