OFFSET
1,1
COMMENTS
Row 3 of A254827
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-1) +3*a(n-30) -3*a(n-31) -3*a(n-60) +3*a(n-61) +a(n-90) -a(n-91)
EXAMPLE
Some solutions for n=4
..2....4....5....3....4....4....4....2....2....5....3....4....4....5....2....3
..2....1....3....2....4....1....2....1....1....1....5....1....2....1....4....2
..4....5....4....4....1....4....4....1....5....4....1....1....3....3....2....5
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 08 2015
STATUS
approved