45540

Appears in sequences

• Number of bipartite graphs with 3 edges on nodes {1..n}.at n=12A053526
• LCM of composite numbers falling between n-th and (n+1)-st primes.at n=12A056831
• Sum of next n integer interprimes (cf. A024675).at n=23A075673
• Number of edges in LCM of graphs K_n and C_4.at n=44A098585
• a(1) = 1, then LCM of consecutive composite numbers sandwiched between primes.at n=28A109920
• Numbers k such that 1*k + 1, 3*k + 1, 9*k + 1, 27*k + 1 are all primes.at n=34A112041
• a(0)=1, a(n) = (3n-1)*3n*(3n+1)/2 for n>0.at n=15A157024
• Numbers with prime factorization pqrs^2t^2.at n=22A189989
• Number of (w,x,y,z) with all terms in {1,...,n} and w>2x and y<=3z.at n=22A212517
• Number of forests with n labeled nodes and 9 trees.at n=3A240686
• Denominator of c(n) = (n^2+n+2)/((n+1)*(n+2)*(n+3)).at n=43A241269
• p-INVERT of (1,0,1,0,0,0,0,...), where p(S) = (1 - S)(1 - 2 S).at n=11A291734
• a(n) = 2n*(n+1)*(2n+1).at n=22A300758