42404

Appears in sequences

• n written in fractional base 6/4.at n=40A024637
• Number of alternating compositions, i.e., compositions with alternating increases and decreases, starting with either an increase or a decrease.at n=24A025047
• Numbers n such that 6*10^n + 3*R_n - 2 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=26A103032
• Number of right triangles on a (n+1)X7 grid.at n=24A189811
• Triangular array read by rows: row n shows the coefficients of the polynomial u(n) = c(0) + c(1)*x + ... + c(n)*x^(n) which is the numerator of the n-th convergent of the continued fraction [k, k, k, ... ], where k = (x + 1)/(x + 2).at n=46A231774