52990

Appears in sequences

• Number of points in N^n of norm <= 2.at n=34A055417
• Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0), ending on the vertical axis and consisting of n steps taken from {(-1, 0), (-1, 1), (0, -1), (0, 1), (1, 0), (1, 1)}.at n=8A151485
• Triangle of coefficients from a polynomial recursion with row sum near =2*5^n: p(x,n)=(x + 1)*(p(x, n - 1) + 2*5^(n - 2)*(x + 5*x^Floor[n/2] + x^(n - 2))).at n=32A153354
• Weird untouchable numbers.at n=26A357326