A280958 Number of n X 5 0..2 arrays with no element equal to more than one of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.

30, 997, 9899, 126267, 1599234, 20029500, 251270618, 3152475854, 39530438497, 495721552160, 6216700479112, 77962372076794, 977711970478121, 12261314459515967, 153766955348557489, 1928363669762835672

Offset

1,1

Comments

Column 5 of A280961.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=4
..0..1..2..1..0. .0..1..0..1..2. .0..1..0..0..2. .0..0..1..0..0
..0..2..0..2..1. .1..2..2..0..0. .1..2..1..2..0. .1..2..1..2..1
..1..1..0..2..0. .0..0..1..2..2. .2..0..0..1..0. .2..0..2..0..2
..0..2..1..0..1. .1..2..1..0..1. .1..1..2..1..2. .1..0..1..0..2

Crossrefs

Cf. A280961.

Sequence in context: A291070 A004994 A273626 * A061466 A180812 A292002

Adjacent sequences: A280955 A280956 A280957 * A280959 A280960 A280961

Keyword

nonn

Author

R. H. Hardin, Jan 11 2017

Status

approved