138642domain: NAppears in sequencesNumber of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 1, 1), (0, 0, 1), (1, -1, 1), (1, 1, -1)}.at n=11A148394Number of binary strings of length n that avoid the pattern x x^R x (x^R is the reversal of x).at n=41A261204