28612

Appears in sequences

• Row 4 of array in A047666.at n=16A047668
• Structured deltoidal hexacontahedral numbers (vertex structure 9).at n=11A100166
• Triangle read by rows: T(n,k) is the coefficient of t^k (k>=0) in the polynomial P[n,t] defined by P[1,t] = P[2,t] = 1, P[3,t] = 1+t, P[n,t] = P[n-1,t] + P^2[n-2,1] for n >= 4.at n=33A103525
• Triangular matrix T, read by rows, that satisfies: [T^k](n,k) = T(n,k-1) for n>=k>0, or, equivalently, (column k of T^k) = SHIFT_LEFT(column k-1 of T) when zeros above the diagonal are ignored.at n=36A107876
• Triangular matrix T, read by rows, that satisfies: [T^k](n,k) = T(n,k-1) for n>=k>0, or, equivalently, (column k of T^k) = SHIFT_LEFT(column k-1 of T) when zeros above the diagonal are ignored.at n=37A107876
• Column 1 of triangle A107876.at n=7A107877
• Matrix square of triangle A107876; equals matrix product of triangles: A107876^2 = A107862^-1*A107870 = A107867^-1*A107873.at n=38A107880
• Matrix inverse of triangle A122175, where A122175(n,k) = C( k*(k+1)/2 + n-k, n-k) for n>=k>=0.at n=36A121435
• a(n) = n*(n+1)*(14*n-11)/6.at n=23A172076
• Number of 2 X 2 matrices having all terms in {-n,...,0,...,n} and determinant n+1.at n=35A211142
• Integers n not of form 3m+2 such that for any integer k > 0, n*10^k+1 has a divisor in the set { 7, 11, 13, 37 }.at n=5A243969
• Numbers n such that Bernoulli number B_{n} has denominator 1410.at n=31A272369
• a(n) is the largest integer k such that sigma(k)/(d(k)*sopf(k)) = n where d=A000005, sigma=A000203 and sopf=A008472.at n=12A328175