161414428

Appears in sequences

• Triangle read by rows. T(n, m) are the coefficients of Sidi polynomials.at n=42A075513
• a(n) = n^9*(n + 1)/2.at n=7A170783
• Number of nX3 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.at n=9A208704
• Expansion of g.f. (1-3*x)/(1-7*x).at n=10A270471
• Numbers of multiplicative persistence 5 which are themselves the product of digits of a number.at n=21A350184
• a(n) is the least k that is a multiple of d=A240991(n), with abundancy ratio sigma(k)/k equal to (sigma(d)+1)/d, or -1 if no such k exists.at n=28A387405