61574

Appears in sequences

• Number of factorization patterns of polynomials of degree n over integers.at n=24A006171
• Numbers n such that 9*10^n + 3*R_n + 4 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=29A103096
• Number of (n+1) X 3 binary arrays with rows and columns in nondecreasing order and with no 2 X 2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one.at n=36A184064
• Triangle read by rows: T(n,k) is the number of secondary structures of size n having k stacks of length 2 (n>=0, k>=0).at n=40A202841
• Number of nX3 0..2 arrays with no element less than a strict majority of its horizontal and vertical neighbors.at n=4A231646
• Number of nX5 0..2 arrays with no element less than a strict majority of its horizontal and vertical neighbors.at n=2A231648
• T(n,k)=Number of nXk 0..2 arrays with no element less than a strict majority of its horizontal and vertical neighbors.at n=23A231651
• T(n,k)=Number of nXk 0..2 arrays with no element less than a strict majority of its horizontal and vertical neighbors.at n=25A231651
• Even composite positive integers m such that A052918(m-1)^2 == 1 (mod m).at n=20A338313