cp's OEIS Frontend

A189331 Number of nondecreasing arrangements of 8 numbers in 0..n with the last equal to n and each after the second equal to the sum of one or two of the preceding four.

%I A189331 #7 Jul 22 2025 11:42:08
%S A189331 2,14,28,70,84,179,157,321,283,461,390,720,482,784,747,988,684,1299,
%T A189331 796,1371,1121,1395,973,2066,1061,1707,1531,2058,1207,2624,1282,2386,
%U A189331 1968,2303,1599,3439,1482,2615,2372,3304,1705,3744,1798,3430,2993,3157,1975
%N A189331 Number of nondecreasing arrangements of 8 numbers in 0..n with the last equal to n and each after the second equal to the sum of one or two of the preceding four.
%C A189331 Row 6 of A189326
%H A189331 R. H. Hardin, <a href="/A189331/b189331.txt">Table of n, a(n) for n = 1..200</a>
%e A189331 Some solutions for n=3
%e A189331 ..0....0....1....1....0....1....1....1....2....1....0....1....3....0....0....1
%e A189331 ..1....3....1....1....1....3....1....1....3....1....1....1....3....1....1....1
%e A189331 ..1....3....1....1....1....3....1....2....3....1....1....1....3....1....1....1
%e A189331 ..1....3....1....2....2....3....2....3....3....1....2....1....3....1....1....1
%e A189331 ..2....3....2....2....3....3....3....3....3....1....2....1....3....1....1....1
%e A189331 ..3....3....3....2....3....3....3....3....3....1....2....2....3....2....1....2
%e A189331 ..3....3....3....3....3....3....3....3....3....2....3....3....3....3....2....2
%e A189331 ..3....3....3....3....3....3....3....3....3....3....3....3....3....3....3....3
%K A189331 nonn
%O A189331 1,1
%A A189331 _R. H. Hardin_ Apr 20 2011