20691

Appears in sequences

• Number of parts in all partitions of all the numbers in {1,2,...,n} into distinct parts.at n=35A015724
• Numbers that are the sum of 3 positive cubes in exactly 3 ways.at n=9A025397
• Numbers that are the sum of 3 positive cubes in 3 or more ways.at n=10A025398
• Numbers that are the sum of 3 distinct positive cubes in exactly 3 ways.at n=7A025401
• Numbers that are the sum of 3 distinct positive cubes in 3 or more ways.at n=8A025402
• a(n) = n^3 + (n+1)^3 + (n+2)^3.at n=18A027602
• Trajectory of 9 under map x->x + (x-with-digits-reversed).at n=6A033651
• Trajectory of 27 under map x->x + (x-with-digits-reversed).at n=5A033659
• Trajectory of 99 under map x->x + (x-with-digits-reversed).at n=4A033674
• a(n) = n*(n-1)*(n^2 + 2)/6.at n=19A071244
• Numbers n for which there are exactly ten k such that n = k + reverse(k).at n=20A072434
• Numbers k for which the quotient q(k)=(k+rev(k))/abs(k-rev(k)) is an integer.at n=14A087993
• a(n) = prime(n) * prime(n+2) - 2 * prime(n+1).at n=33A152532
• The number of ways to color the vertices of all (11) simple unlabeled graphs on 4 nodes using at most n colors.at n=8A199394
• Triangle version of the array w(N,L) of the average number of round trips of length L on Laguerre graphs L_N.at n=38A201198
• Number of (w,x,y,z) with all terms in {1,...,n} and w+y=|x-y|+|y-z|.at n=34A212677
• Numbers that can be expressed as the sum of three nonnegative cubes in three ways.at n=13A219329
• Number of defective 3-colorings of an n X 7 0..2 array connected horizontally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order.at n=1A229693
• T(n,k) = number of defective 3-colorings of an n X k 0..2 array connected horizontally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order.at n=29A229694
• Number of defective 3-colorings of a 2Xn 0..2 array connected horizontally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..2 order.at n=6A229695