20184

Appears in sequences

• Row sums of triangle A067979; also of triangle A067990.at n=10A067989
• Expansion of (1-2x-3x^2)/((1-2x)(1+4x)(1-8x)).at n=5A122910
• Triangular sequence defined by T(n, m) = (r^(n-m)*q^m + r^m*q^(n-m))*b(n), where b(n) = coefficients of p(x, n) = 2^n*(1-x)^(n+1) * LerchPhi(x, -n, 1/2), and r=2, q=1.at n=17A154695
• Triangular sequence defined by T(n, m) = (r^(n-m)*q^m + r^m*q^(n-m))*b(n), where b(n) = coefficients of p(x, n) = 2^n*(1-x)^(n+1) * LerchPhi(x, -n, 1/2), and r=2, q=1.at n=18A154695
• a(n) = 24*n^2.at n=29A195824
• Expansion of ( f(-q)^12 + 22 * q * f(-q)^6 * f(-q^5)^6 + 125 * q^2 * f(-q^5)^12 ) / (f(-q) * f(-q^5))^2 in powers of q where f() is a Ramanujan theta function.at n=13A235870
• Smallest area of triangle with integer sides and area = n times perimeter.at n=28A289155
• a(n) is the total surface area of a hollow cubic block (defined as a block with a shell thickness of 1 cube) where n is the edge length of the removed volume.at n=39A309842