OFFSET
1,1
COMMENTS
Column 3 of A278363.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = (1/1307674368000)*n^15 + (1/12454041600)*n^14 + (1/261273600)*n^13 + (103/958003200)*n^12 + (28957/14370048000)*n^11 + (2351/87091200)*n^10 + (493841/1828915200)*n^9 + (23017/12441600)*n^8 + (2500237/326592000)*n^7 + (749051/43545600)*n^6 + (66037039/718502400)*n^5 + (44644261/119750400)*n^4 + (706708321/825552000)*n^3 + (217312/135135)*n^2 + (28943/27720)*n
EXAMPLE
Some solutions for n=4
..1..1..1. .0..0..0. .0..0..1. .0..1..0. .0..0..1. .0..1..1. .0..1..1
..0..0..0. .0..1..1. .0..1..1. .1..0..0. .0..0..1. .0..0..0. .0..1..1
..0..0..1. .1..0..1. .0..1..0. .1..0..0. .1..1..0. .1..1..1. .0..0..0
..1..1..0. .0..1..0. .1..1..1. .1..0..0. .0..1..1. .1..1..1. .1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 19 2016
STATUS
approved