100096

Appears in sequences

• Numbers k such that k and k^2 use only the digits 0, 1, 2, 6 and 9.at n=43A136830
• Number of obtuse triangles, distinct up to congruence, on a centered hexagonal grid of size n.at n=19A241234
• E.g.f. S(x,y) = sin(x) / sqrt(1 - sin(x)^2 - sin(y)^2).at n=18A324610
• E.g.f. S(y,x) = sin(y) / sqrt(1 - sin(x)^2 - sin(y)^2).at n=17A324612
• Irregular triangular array T; row n shows the coefficients of the (n-1)-st polynomial in the obverse convolution s(x)**t(x), where s(x) = x+F(n) and t(x) = x+F(n), and F(n) = n-th Fibonacci number (A000045). See Comments.at n=31A375049