128880

Appears in sequences

• a(n) = (n^2 - 1)*(n^2 - 3).at n=19A033596
• Number of configurations of linear chains in a cubic lattice.at n=7A047057
• Number of compositions of n where each part i is marked with a word of length i over a binary alphabet whose letters appear in alphabetical order and both letters occur at least once in the composition.at n=8A293579
• Numbers of the form p^2 - 1 where p is a prime of the form 3*k-1 (A003627).at n=37A301812
• a(n) = 144*n^2 - 24*n (n>=1).at n=29A305072
• Numbers such that the two adjacent integers are a prime and the square of another prime.at n=28A347194
• a(n) = n!*Sum_{m=0..floor((n-1)/2)} 1/(n-m)/binomial(n-m-1,m).at n=8A358491
• Triangle read by rows: T(n,k) is the number of unordered pairs of nodes at distance k in the n-Dorogovtsev-Goltsev-Mendes graph.at n=25A384844