A250679 Number of (3+1)X(n+1) 0..3 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.
2512, 34630, 388916, 4008211, 38224684, 345255872, 2996016017, 25227877364, 207711004347, 1680947958659, 13425296521939, 106128580452188, 832257246775220, 6485280761219682, 50282187542669984, 388284093532906123
Offset: 1
Keywords
Examples
Some solutions for n=2 ..2..0..0....0..0..0....3..0..3....1..0..1....1..1..3....1..1..1....1..2..0 ..2..0..1....1..1..1....1..2..1....2..1..3....1..1..3....2..0..2....3..0..2 ..2..1..2....1..2..0....2..1..3....1..3..1....0..2..2....2..1..3....2..1..3 ..2..2..1....0..3..3....3..2..2....1..3..2....1..3..1....2..2..2....1..3..1
Links
- R. H. Hardin, Table of n, a(n) for n = 1..210
- R. H. Hardin, Empirical recurrence of order 58K
Formula
Empirical recurrence of order 58 (see link above)
Comments