80851

Appears in sequences

• Number of walks within N^2 (the first quadrant of Z^2) starting and ending at (0,0) and consisting of n steps taken from {(-1, 0), (-1, 1), (0, -1), (0, 1), (1, -1)}.at n=13A151347
• a(n) = 66*n^2 + 1.at n=35A158689
• Number of strings of n numbers x(i) in -7..7 with sums of x(i) and of x(i)*x(i+1) both zero.at n=6A183942
• The integer part of the surface area of the 4-dimensional sphere of radius n.at n=15A261791
• Numbers n for which A326073(n) is equal to abs(1+A326146(n)).at n=20A326074