42448

Appears in sequences

• Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0) and consisting of n steps taken from {(-1, -1), (-1, 0), (1, -1), (1, 1)}.at n=10A151271
• Exponential Riordan array (e^(mx),x*A000108(x)), m=2.at n=41A185947
• Monotonic ordering of set S generated by these rules: if x and y are in S then x^2+y^2-xy is in S, and 2 is in S.at n=35A192533
• Irregular triangle read by rows: coefficients of polynomials arising in calculation of squares of certain web-coloring matrices.at n=29A281351