224449

Properties

Appears in sequences

• Number of partitions of n of the form a_1*b_1^2 + a_2*b_2^2 + ...; number of semisimple rings with p^n elements for any prime p.at n=43A004101
• Number of permutations (p(1),p(2),...,p(n)) of (1,2,...,n) such that p(i)-i is in {-2,-1,3} for all i=1,...,n.at n=42A079999
• a(n) = 128*n^2 + 2528*n + 12481.at n=31A157436
• Number of n X 2 arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..3 n X 2 array.at n=13A219465
• Primes having only {2, 4, 9} as digits.at n=30A385785
• Prime numbersat n=19976