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