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A189319
Number of nondecreasing arrangements of n+2 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
1
2, 6, 11, 32, 54, 179, 253, 866, 1161, 3234, 4100, 12289, 11179, 28957, 35448, 81956, 60820, 184122, 127607, 389213, 298758, 584334, 434068, 1773649, 705685, 1778949, 1505153, 3979185, 1735705, 7116031, 2564548, 11409548, 5647305, 10489351
OFFSET
1,1
COMMENTS
Diagonal of A189326
LINKS
EXAMPLE
All solutions for n=3
..0....1....3....0....1....2....1....1....1....1....1
..3....2....3....1....3....3....1....1....2....2....1
..3....3....3....1....3....3....1....2....2....2....2
..3....3....3....2....3....3....2....3....2....3....2
..3....3....3....3....3....3....3....3....3....3....3
CROSSREFS
Sequence in context: A365046 A296390 A135048 * A268501 A376981 A026564
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 20 2011
STATUS
approved