234484

Appears in sequences

• a(n) = n^2*(n^2 + 15)/4.at n=31A159833
• a(n) = p(p+1)^2, where p is the n-th prime.at n=17A178398
• Molecular topological indices of the complete bipartite graphs K_{n,n}.at n=30A192418
• Number of nX3 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes.at n=3A278629
• Number of nX4 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes.at n=2A278630
• T(n,k)=Number of nXk 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes.at n=17A278634
• T(n,k)=Number of nXk 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes.at n=18A278634
• Number of nX6 0..1 arrays with every element equal to 0, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=9A301904
• Expansion of 1/sqrt(1 - 4*x - 8*x^4).at n=10A374599