19584

Appears in sequences

• Number of bipartite partitions of n white objects and 7 black ones.at n=11A002756
• Theta series of 18-dimensional lattice associated with Sp_4(4), with det 256 and minimal norm 3.at n=5A005950
• Numbers n such that A048767(n) = n.at n=28A048768
• Number of atoms in cluster of n layers around C_60.at n=17A063498
• a(n) = phi(n^3 + n^2 + n + 1).at n=37A066792
• Triangle read by rows: T(n,k) is the number of alternating max-precedes-min permutations on [n+2] with 1 in position k+2, 0<=k<=n.at n=47A104346
• Primal codes of finite permutations on positive integers.at n=34A109297
• a(n) = 16*n*(n+2).at n=34A114444
• Numbers such that the sum of the factorials of the digits of the fifth power is a square.at n=20A126078
• a(n) = 2*a(n-2) + 4*a(n-3), with initial terms 0, 1, 1.at n=16A134136
• a(1) = 1, a(2) = 2; a(n) = a(n-a(1)) + a(n-a(2)) + a(n-a(3)) + a(n-a(4)) + ...at n=16A141435
• Numbers k such that the set of prime factors of phi(k) is a proper subset of the set of prime factors of k and the set of prime factors of k is a proper subset of the set of prime factors of sigma(k).at n=39A141717
• First differences of A171733.at n=33A171734
• Expansion of o.g.f. 2*(1+x)^2/(1-2*x+sqrt(1-8*x)).at n=6A182959
• Numbers with prime factorization pq^2r^7.at n=6A190466
• Number of 1X4 integer matrices with each row summing to zero, row elements in nondecreasing order, rows in lexicographically nondecreasing order, and the sum of squares of the elements <= 2*n^2 (number of collections of 1 zero-sum 4-vectors with total modulus squared not more than 2*n^2, ignoring vector and component permutations).at n=44A192691
• Number of (w,x,y) with all terms in {0,...,n} and |w-x|+|x-y|+|y-w| <= w+x+y.at n=29A213487
• Number of (n+1) X (n+1) 0..5 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 5, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).at n=3A235178
• Number of (n+1) X (4+1) 0..5 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 5, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).at n=3A235182
• T(n,k) is the number of (n+1) X (k+1) 0..5 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 5, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).at n=24A235186