57420

Appears in sequences

• Smallest positive number of "triangular" shuffles of n(n+1)/2 cards needed to restore them to their original order.at n=25A122158
• Amicable triples: numbers such that sigma(x) = sigma(y) = sigma(z) = x+y+z, x<y<z. We order these triples according to the common value of sigma. Sequence gives x numbers.at n=11A125490
• Number of nX1 0..1 arrays with exactly floor(nX1/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order.at n=21A222283
• Number of n X 2 0..1 arrays with exactly floor(nX2/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order.at n=11A222763
• Number T(n,k) of collections of nonempty multisets with a total of n objects of exactly k colors; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=49A255903
• Number of collections of nonempty multisets with a total of n objects of exactly four colors.at n=5A255944
• Number of collections of nonempty multisets with a total of n+5 objects of exactly n colors.at n=4A255955
• a(n) = 5*(n+1)*(9*n+4).at n=35A304507
• Triangle T(n, k) read by rows, n > 0 and 0 < k <= 3^(n-1): T(n, k) = A321768(n, k) * A321769(n, k) / 2.at n=29A322170
• Numbers k such that k*A003557(A003961(k)) divides A353790(k), where A353790(n) = phi(A003973(n)) * A064989(A003973(n)).at n=19A353797
• Number of integer compositions of n with the same length as their alternating sum.at n=23A357182
• Numbers whose sum of prime divisors equals the sum of square divisors.at n=25A390397