97968

Appears in sequences

• Triangle read by rows: T(n,k) (n >= 2, 1<=k<=n-1) is the number of permutations p of 1,...,n with max(|p(i)-p(i-1)|, i=2..n) = k.at n=33A064482
• Smaller of consecutive values in A075407.at n=15A074888
• The Wiener index of the double-comb graph \/_\/_\/...\/_\/ with 3n (n>=1) nodes. The Wiener index of a connected graph is the sum of the distances between all unordered pairs of vertices in the graph.at n=38A192025
• Square rings obtained by adding four identical cuboids from A169938, a(n) = 4*n*(n+1)*(n*(n+1)+1).at n=12A288486
• Triangle T(n,k) read by rows: connected topologies of Goldstone diagrams with n interactions and k external potentials.at n=15A328923
• Numbers such that the two adjacent integers are a prime and the square of another prime.at n=26A347194
• Numbers of the form (p+1)*(p+3) where (p,p+2) is a twin prime pair (cf. A001359).at n=19A362941
• Numbers k such that k^2 - 1 and k^2 + 1 have 6 divisors each.at n=2A373213
• a(n) = denominator of the sum S(n) defined in A376062.at n=3A376185