Number of 0..n arrays x(0..3) of 4 elements without any two consecutive increases
16, 75, 225, 530, 1071, 1946, 3270, 5175, 7810, 11341, 15951, 21840, 29225, 38340
1 seqfan posts
Tue Nov 22 20:05:59 CET 2011 [seqfan] Oops! guess the formula http://oeis.org/A200786