3527160

Appears in sequences

• a(n) = (2n+3)!/(n!*(n+2)!).at n=9A000917
• a(n) = (9*n + 11)*binomial(n+10, 10)/11.at n=11A056128
• Numbers that can be expressed as the difference of the squares of primes in exactly twenty distinct ways.at n=1A092016
• (n-1)! divided by (product phi(d)! ; d divides n).at n=20A120066
• Numbers with prime factorization pqrstuv^3.at n=5A190316
• Number of valleys in all left factors of Dyck paths of length n. A valley is a (1,-1)-step followed by a (1,1)-step.at n=22A191522
• Number of turns in all left factors of Dyck paths of length n.at n=21A191527
• a(n) = (n!*m)/(m!*(m+1)!) where m = floor(n/2).at n=21A237884
• Numbers n such that the multiplicative group modulo n is the direct product of 8 cyclic groups.at n=5A272598
• Let v = list of denominators of Farey series of order n (see A006843); let b(n) = Sum 1/(k*k'*(k+k')), where (k,k') are pairs of successive terms of v; a(n) = denominator of b(n).at n=9A278048
• Triangle read by rows in which row(n) = {T(n, k)} is the lexicographically earliest list of n numbers such that adding 1 to some T(n, k) gives a row of numbers each divisible by prime(k).at n=32A286947
• a(n) = (8*n + 18)*Pochhammer(n, 6) / 6!.at n=14A293614