A306372 - cp's OEIS frontend

A306372 Number of n X n integer matrices (m_{i,j}) such that m_{1,1}=1, m_{n,n}=n, and all rows and columns are (weakly) monotonic without jumps larger than 1.

%I A306372 #20 Dec 01 2023 05:16:25
%S A306372 1,4,44,1236,84910,14024408,5530983756,5192169001644,
%T A306372 11583105980431652,61353264333274642456,771168645274178148758934,
%U A306372 22993716372161876140519972488,1625987621134180524757435478838056,272649922373702777601949547955204462396,108399145705124270227889424469312592196654704
%N A306372 Number of n X n integer matrices (m_{i,j}) such that m_{1,1}=1, m_{n,n}=n, and all rows and columns are (weakly) monotonic without jumps larger than 1.
%F A306372 a(n) = A323849(n,n-1).
%Y A306372 Cf. A323849, A367432.
%K A306372 nonn
%O A306372 1,2
%A A306372 _Alois P. Heinz_, Feb 11 2019

cp's OEIS Frontend

A306372 Number of n X n integer matrices (m_{i,j}) such that m_{1,1}=1, m_{n,n}=n, and all rows and columns are (weakly) monotonic without jumps larger than 1.