A193059 Number of size n nonnegative integer arrays with new values introduced in increasing order from 0, and no 4 consecutive elements totalling n or more

1, 2, 4, 11, 30, 103, 423, 1898, 9186, 48459, 277813, 1682335, 10842496, 73622545, 532098309, 4013332419, 31553670222, 258169433450, 2231159821028, 19826045896926, 182181813932571, 1733395478474786, 17237091890882863

Offset

1,2

Links

R. H. Hardin, Table of n, a(n) for n = 1..61

Example

Some solutions for n=8
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
..1....1....1....1....1....0....1....1....1....1....1....1....0....1....1....0
..2....2....0....1....1....1....1....0....0....1....0....1....1....1....2....1
..0....0....0....1....0....2....2....2....1....1....0....0....1....2....1....1
..1....0....0....2....2....0....2....1....2....2....2....0....1....2....0....2
..1....2....2....3....0....0....1....3....0....1....0....2....2....1....0....1
..1....0....2....0....0....0....0....1....1....0....3....2....0....2....3....3
..1....1....2....2....3....3....1....2....3....2....2....0....2....2....0....1

Crossrefs

Sequence in context: A148159 A275310 A102814 * A034770 A276687 A298891

Adjacent sequences: A193056 A193057 A193058 * A193060 A193061 A193062

Keyword

nonn

Author

R. H. Hardin Jul 15 2011

Status

approved