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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. 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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified November 13 08:16 EST 2019. Contains 329085 sequences. (Running on oeis4.)