42757

Appears in sequences

• 4-dimensional analog of centered polygonal numbers.at n=23A006325
• a(1) = 1, a( n) = prime(a(n-1)) + 4a(n-1).at n=5A179515
• Coefficient of x in the reduction by (x^2 -> x + 1) of the polynomial p(n,x) given in Comments.at n=10A192875
• Number of n X 3 0..1 arrays with rows and antidiagonals unimodal and columns nondecreasing.at n=38A224141
• 26-gonal pyramidal numbers: a(n) = n*(n+1)*(8*n-7)/2.at n=22A256646
• a(n) = n^2*(3*n^2 - 1)/2.at n=13A260810
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 193", based on the 5-celled von Neumann neighborhood.at n=7A270686
• Numbers k such that k is a multiple of A243071(k).at n=52A364964
• Odd numbers k such that k is a multiple of A243071(k).at n=4A364965