19656

Appears in sequences

• a(n) = (5*n + 1)*(5*n + 2)*(5*n + 3).at n=5A001509
• a(n) = n*(n-1)*(n-2) (or n!/(n-3)!).at n=28A007531
• Theta series of A_8 lattice.at n=6A008448
• Area of more than one Pythagorean triangle.at n=17A009127
• a(n) = floor(binomial(n,5)/5).at n=28A011851
• a(n) = floor( n*(n-1)*(n-2)*(n-3)/25 ).at n=28A011935
• a(n) = floor( n*(n-1)*(n-2)*(n-3)/29 ).at n=29A011939
• tan(arcsin(x)*exp(x))=x+2/2!*x^2+6/3!*x^3+32/4!*x^4+240/5!*x^5...at n=7A012318
• Differences between two positive cubes in exactly 2 ways.at n=13A014440
• a(n) = T(2n-1,n), where T is the array in A026148.at n=6A026156
• Sum{T(n,k)*T(n,k+3)}, 0<=k<=2n-3, T given by A027926.at n=5A027997
• Theta series of tensor cube of A_2 lattice (dimension 8, det 3^12).at n=31A033688
• Related to triple factorial numbers A007559(n+1).at n=5A034171
• Difference between two positive cubes in more than one way.at n=14A034179
• A convolution triangle of numbers obtained from A034171.at n=15A035529
• Sum of two (possibly negative) cubes in at least 3 ways.at n=5A051383
• Numbers whose 4th power can be expressed as the sum of two positive cubes in more than one way.at n=11A051388
• Reduced denominators of the coefficients in a series expansion for Gamma[x].at n=24A054380
• Number of ternary sequences with primitive period n.at n=9A054718
• Coefficient triangle of polynomials (rising powers) related to Pell number convolutions. Companion triangle is A058403.at n=6A058402