155040

Appears in sequences

• E.g.f. 1/(1-4x-x^2).at n=5A052630
• Triangle T(n,i) whose n-th row gives the number of numbers in any prime(n)# consecutive numbers whose smallest prime factor is prime(n-i+1).at n=30A174909
• Convolution square of A058187, the tetrahedral series with repeats.at n=27A178440
• Central terms of the triangle A182579.at n=14A182584
• Numbers with prime factorization pqrst^5.at n=22A190383
• a(n) = [x^n] (1 + x)/(1 - x)^(2*n+1).at n=7A227726
• Sum of all the parts in the partitions of 4n into 4 parts.at n=16A238328
• Number of preferential arrangements of n labeled elements such that the minimal number of elements per rank equals 7.at n=13A245860
• a(n) = 10*binomial(n+4, 5).at n=16A266732
• a(1) = 1; thereafter a(n) is the product of all 0 < m < n for which n == a(m) (mod m).at n=40A271530
• Triangle T(n,k) read by rows: T(n,k) = A005867(k-1)*A002110(n)/A002110(k).at n=33A293558
• a(n) = (1/4)*(n^2 - 2*n)^2 + (9/4)*(n^2 - 2*n) + 6.at n=28A294070
• Number of nX2 0..1 arrays with every element unequal to 0, 1, 2, 4 or 5 king-move adjacent elements, with upper left element zero.at n=11A304341