32020

Appears in sequences

• a(n) = n*(n^2 + 1)/2.at n=40A006003
• a(n) = 1000*n + 20.at n=31A157510
• Number of n X 3 0..1 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.at n=7A224153
• T(n,k)=Number of nXk 0..1 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.at n=52A224158
• Number of length n+3 0..3 arrays with no four elements in a row with pattern aabb (with a!=b) and new values 0..3 introduced in 0..3 order.at n=6A242579
• T(n,k)=Number of length n+3 0..k arrays with no four elements in a row with pattern aabb (with a!=b) and new values 0..k introduced in 0..k order.at n=42A242584
• Row sums of the triangular array A246696.at n=39A246697
• Indices of Ulam prime triples, where u(k), u(k+1) and u(k+2) are all primes, and u(k) = A002858(k) are the Ulam numbers.at n=13A307330
• a(n) = (n - 1)*(4*n^2 - 8*n + 5).at n=20A317297
• Triangular array read by rows: T(n,k) is the number of transitive relations on n labeled nodes with exactly k connected components.at n=25A343882