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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A189326

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..57

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: A165821 A296390 A135048 * A268501 A026564 A243794

Adjacent sequences:  A189316 A189317 A189318 * A189320 A189321 A189322

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 20 2011

STATUS

approved

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Last modified May 23 20:23 EDT 2019. Contains 323528 sequences. (Running on oeis4.)