190800

Appears in sequences

• Terms in certain determinants.at n=6A002776
• Theta series of Niemeier lattice of type D_6^4.at n=2A008696
• Duplicate of A008696.at n=2A047806
• Triangle of numbers a(n,k) = number of terms in n X n determinant with 2 adjacent diagonals of k and k-1 0's (0<=k<=n).at n=48A047922
• E.g.f. (1-x)^2/(1-3x+x^3).at n=6A052620
• a(n) = n! * d(n), where n! = factorial numbers (A000142), d(n) = subfactorial numbers (A000166).at n=6A082491
• Triangle T(n,k) read by rows, where T(n,k) = number of times the permanent of a real nonsingular n X n (0,1)-matrix takes the value k, for n >= 1, 1 <= k <= A000255(n).at n=25A089480
• (Signless) coefficient of x^k in the admittance polynomial of the connected antiregular graph A_n.at n=47A188286
• Table of the elementary symmetric functions a_k(1,2,3,4,6,...,n+1) (5 missing).at n=43A196844
• Number of nX6 1..(max n,6) arrays with each row and column having unrepeated values.at n=1A221436
• T(n,k) is the number of n X k 1..(max n,k) arrays with each row and column having unrepeated values.at n=22A221438
• T(n,k) is the number of n X k 1..(max n,k) arrays with each row and column having unrepeated values.at n=26A221438
• Number of defective (binary) heaps on n elements with exactly one defect.at n=10A323957
• Number of defective (binary) heaps on n elements with exactly nine defects.at n=2A323965
• Number T(n,k) of permutations of [n] having k cycles of the form (c1, c2, ..., c_m) where c1 = min_{i>=1} c_i and c_j = min_{i>=j} c_i or c_j = max_{i>=j} c_i; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=58A344855
• Number of permutations of [n] having three cycles of the form (c1, c2, ..., c_m) where c1 = min_{i>=1} c_i and c_j = min_{i>=j} c_i or c_j = max_{i>=j} c_i.at n=7A346318
• Coreful triperfect numbers: numbers k such that csigma(k) = 3*k, where csigma(k) is the sum of the coreful divisors of k (A057723).at n=15A364990
• Exponential abundant numbers that are not exponential unitary abundant.at n=27A391085
• Exponential Zumkeller numbers that are not exponential unitary Zumkeller numbers.at n=30A391090