18876

Appears in sequences

• a(n) = n^2*(n+1)^2*(n+2)/12.at n=11A004302
• Number of walks on cubic lattice.at n=10A005571
• Theta series of lattice Kappa_9.at n=8A015233
• a(n) = (2*n - 5)n^2.at n=22A015240
• a(n) = floor(n/2) * floor((n-1)/2) * floor((n-2)/2) * floor((n-3)/2) * floor((n-4)/2) / 12.at n=26A028725
• Number of 6-ary rooted trees with n nodes and height exactly 4.at n=19A036642
• Sums of 4 distinct powers of 5.at n=28A038476
• Numbers with multiplicative persistence value 6.at n=23A046515
• a(n) = n*(n-1)*(n-2)^2.at n=11A047927
• Partial sums of A050406.at n=7A052254
• Numbers k such that 2^k + 7 is prime.at n=36A057195
• G.f.: 1/((1-x^2)^3*(1-x)^4).at n=17A060099
• Arithmetic derivative of cubes: a(n) = 3*n^2*A003415(n).at n=21A068721
• Group the triangular numbers so that the n-th group sum is a multiple of n. 1, (3, 6, 10, 15), (21), (28), (36, 45, 55, 66, 78), (91, 105, 120, 136, 153, 171, 190), ... Sequence contains the group sums.at n=12A114031
• Antidiagonal sums of triangle A118190: a(n) = Sum_{k=0..floor(n/2)} 5^(k*(n-2*k)) for n>=0.at n=7A118192
• Number of branches in all binary trees with n edges. A binary tree is a rooted tree in which each vertex has at most two children and each child of a vertex is designated as its left or right child.at n=7A121686
• A090801(2n-1)+A090801(2n).at n=41A140958
• A054525 * A156348 * [1,2,3,...].at n=47A156833
• Row sums of A163357 and A163359.at n=29A163365
• Number of binary strings of length n with equal numbers of 00010 and 01011 substrings.at n=15A164217