57192

Appears in sequences

• Total number of nodes in all rooted trees with n nodes.at n=11A055544
• a(n) = T(n,n-4), array T as in A055818.at n=29A055821
• Third extended Jacobsthal recurrence: a(n)=4a(n-1)-6(n-2)+4a(n-3)-a(n-4)+2a(n-5).at n=19A134987
• Sequence of the "Natural Jewels": a natural jewel is a number that is totally enclosed by prime numbers in a version of Ulam Spiral.at n=27A172294
• Maximum value of (1/2)*Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} Sum_{l=1..n} gcd(b(i,j),b(k,l)) * ((i-k)^2+(j-l)^2) for an n X n matrix b filled with the integers 1 to n^2.at n=6A261177
• Number of n X 1 0..1 arrays with the number of 1's king-move adjacent to some 0 one less than the number of 0's adjacent to some 1.at n=18A284449
• Number of n X 2 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 one less than the number of 0's adjacent to some 1.at n=8A285146
• Numbers on the square spiral board that are enclosed by four primes.at n=27A341542
• Number of words of length n, over the alphabet {a,b,c}, which have an odd number of a's and the number of b's plus the number of c's is less than or equal to 3.at n=36A342159
• Number of Motzkin paths of length n up to reversal.at n=14A378941