39524

Appears in sequences

• Numbers k such that phi(k) = phi(k+1).at n=25A001274
• Convolution of natural numbers n >= 1 with Lucas numbers L(k)(A000032) for k >= 2.at n=16A033811
• 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), (-1, 0, 1), (1, 0, 1), (1, 1, 0)}.at n=8A150696
• Numbers k such that lambda(k) = lambda(k+1).at n=28A173695
• Monotonic ordering of nonnegative differences 7^i-5^j, for 40>= i>=0, j>=0.at n=22A192196
• Imaginary part of g.f. C(x) that satisfies: C(x) = 1 + x*C(I*x)^2.at n=16A193378
• Number of (n+1)X(3+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or vertically, with no adjacent elements equal.at n=8A232401
• G.f. satisfies A(x) = ( 1 + x*A(x)^2*(1 + x*A(x)) )^2.at n=6A365153