24471

Appears in sequences

• Convolution of primes with themselves.at n=24A014342
• Number of partitions of n into at most 1 copy of 1, 2 copies of 2, 3 copies of 3, ... .at n=49A052335
• Numbers k such that sigma(k-3) + sigma(k+3) = sigma(2*k).at n=24A067129
• a[n] =a[n-1] + 2*n*Prime[n]-n^2.at n=22A093809
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (0, 0, 1), (0, 1, 0), (1, 1, -1), (1, 1, 1)}.at n=7A151191
• a(n) = Sum_{k<=n} A000203(k)*(n-k+1), where A000203(m) is the sum of divisors of m.at n=43A175254
• Number of ways to tile a fixed 3 x n square grid with 1 x 1, 2 x 2, and axially-oriented 1 x 2 tiles.at n=6A226348
• Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the diagonal and antidiagonal minus the two minimums of the central column and central row nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=17A254899
• a(n) = A000032(n)*A000032(n+1) mod A000032(n+2).at n=19A347861