A031268 a(n)=(# 3's)-(# 4's) in first n terms of A031253.
0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 2, 2, 3, 3, 4, 3, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 2, 2, 2, 3, 4, 4, 3, 3, 3, 2, 2, 2, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 2, 3, 3, 3, 4
Offset: 1