23059204

Appears in sequences

• Triangle, read by rows, of Stirling numbers of first kind, S1(n,k), multiplied by k^k, for n >= 1, 1<=k<=n.at n=34A105196
• Triangle, read by rows, of Stirling numbers of second kind, S2(n,k), multiplied by k^k, for n >= 1, 1<=k<=n.at n=34A105197
• a(n) = (n^(n+1))*(n + 1)/2 = A000217(n)*A000312(n).at n=7A109391
• Triangle, read by rows, where T(n,k) = A049020([n/2],k)*A049020([(n+1)/2],k).at n=58A124526
• a(n) = n^8*(n + 1)/2.at n=7A168675
• Number of nX3 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.at n=8A208704
• Integers m such that A240923(m) = 1, where A240923(n) = numerator(sigma(n)/n) - sigma(denominator(sigma(n)/n)).at n=28A240991
• Expansion of g.f. (1-3*x)/(1-7*x).at n=9A270471
• Triangle read by rows: T(n,k) = n^3*k^3*(n+k)^2, n>=0, 0 <= k <= n.at n=35A358294
• Triangle read by rows: T(n,k) = n^3*k^3*(n+k)^2, n>=1, 1 <= k <= n.at n=27A358295
• Numbers k such that sigma(A253560(k)) / A253560(k) is equal to (sigma(k)+1) / k, where A253560(k) = k multiplied by its largest prime factor.at n=40A387406
• Numbers k = p_i^e_i * p_j^e_j such that i/e_i + j/e_j = 1 for e_i, e_j >= 1, p_i, p_j distinct prime numbers.at n=9A387978
• Numbers k = p_i^e_i *...* p_r^e_r such that i/e_i +...+ r/e_r = 1 for e_i,..., e_r >= 1; p_i,..., p_r distinct prime numbers (A000040).at n=15A388006
• a(n) is the median of the set of the distinct values of (n-1)^n, (n-1)^(n+1), n^(n-1), n^(n+1), (n+1)^(n-1), (n+1)^n.at n=7A391414