28476

Appears in sequences

• Number of 4-line partitions of n decreasing across rows.at n=26A003292
• Number of walks of length n on the simple cubic lattice terminating at height 2 above the (x,y)-plane.at n=5A052178
• Triangle of numbers arising in enumeration of walks on cubic lattice.at n=30A052179
• Numbers k that divide phi(k)^2 + sigma(k)^2.at n=37A068484
• Matrix product of Stirling2-triangle A008277(n,k) and unsigned Stirling1-triangle |A008275(n,k)|.at n=41A079641
• Triangle of Schroeder paths counted by number of diagonal steps not preceded by an east step.at n=60A108916
• T(n, k) = [x^k] Sum_{k=0..n} Stirling2(n, k)*RisingFactorial(x, k), triangle read by rows, for n >= 0 and 0 <= k <= n.at n=51A129062
• Sums of the products of n consecutive pairs of numbers.at n=27A135036
• Triangle read by rows: coefficients of polynomials related to the exponential generating function of sequences generated by Narayana polynomials evaluated at the integers; n>=1, 0<=k<n.at n=51A247502
• Triangle read by rows: T(n,m) = Sum_{i=1..n} C(n,i-m)*C(n+m-i,i-1)*C(n+m-i,m)/n, with T(0,0)=1.at n=60A337991
• For 1<=x<=n, 1<=y<=n, write gcd(x,y) = u*x+v*y with u,v minimal; a(n) = n^4*s, where s is the population variance of the values of u+v.at n=11A345724
• Number of n X 3 0..2 matrices with row sums 3 and column sums n up to permutations of rows.at n=50A377067