104755

Appears in sequences

• a(n) = 2*binomial(n+4, 4) + n + 4.at n=31A177206
• Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having k increasing cycles of length >=2 (0<=k<= n/2). A cycle (b(1), b(2), ...) is said to be increasing if, when written with its smallest element in the first position, it satisfies b(1) < b(2) < b(3) < ... .at n=33A186757
• Number of (n+1) X (1+1) 0..2 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.at n=8A250625
• Heptagonal numbers which are products of four distinct primes.at n=12A351867
• Cogrowth sequence of the 20-element Frobenius group Frob20 = <S,T | S^5, T^4, (ST)^4>.at n=21A378278