68750

Appears in sequences

• Hypotenuses for which there exist exactly 5 distinct Pythagorean triangles.at n=15A084649
• Number 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), (-1, 0, 0), (0, -1, 0), (0, 1, -1), (1, 0, 1)}.at n=10A148925
• Number of n step walks (each step +-1 starting from 0) which are never more than 4 or less than -4.at n=17A216212
• Expansion of (1+x)*(1+2*x)*(1-x)/(1-5*x^2+5*x^4).at n=17A217777
• Prime factorization representation of Stern polynomials B(n,x) with only the even powers of x present: a(n) = A247503(A260443(n)).at n=69A284553
• a(n) = A247503(A277324(n)).at n=34A284563
• Primitive terms of A108569.at n=33A346277