A323973 Number of 9 X n integer matrices (m_{i,j}) such that m_{1,1}=0, m_{9,n}=2, and all rows, columns, and falling diagonals are (weakly) monotonic without jumps of 2.

1, 28, 406, 4631, 38304, 249814, 1357051, 6362806, 26400811, 98755951, 337852708, 1069253171, 3159851197, 8786784471, 23140533785, 58032604728, 139238130793, 320911139366, 712976624945, 1531659348507, 3190199728577, 6457722870812, 12731177730290, 24491108899982

Offset

0,2

Links

Alois P. Heinz, Table of n, a(n) for n = 0..10000

Crossrefs

Row (or column) 9 of array in A323846.

Sequence in context: A162727 A010980 A022592 * A121798 A238600 A278009

Adjacent sequences: A323970 A323971 A323972 * A323974 A323975 A323976

Keyword

nonn,easy

Author

Alois P. Heinz, Feb 09 2019

Status

approved