36120

Appears in sequences

• Number of n-step walks on square lattice in the first quadrant which finish at distance n-3 from the x-axis.at n=39A005564
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 19.at n=9A031697
• Base 7 digits are, in order, the first n terms of the periodic sequence with initial period 2,1,0.at n=5A037524
• First differences of A069474, successive differences of (n+1)^6-n^6.at n=8A069475
• a(n) can be expressed as the difference of the squares of consecutive primes in just three distinct ways.at n=5A090783
• Numbers that can be expressed as the difference of the squares of primes in exactly eleven distinct ways.at n=5A092007
• Triangle read by rows: T(n,h) = number of functions f:{1,2,...,n}->{1,2,...,n-1} such that |Image(f)|=h, h=1,2,...,n-1, n=2,3,...at n=17A101819
• Triangle read by rows: T(n,h) = number of functions f:{1,2,...,n}->{1,2,...,n-2} such that |Image(f)|=h, h=1,2,...,n-2; n=3,4,....at n=12A101821
• Triangle read by rows: T(n,k) is the number of deco polyominoes of height n and having k columns of even length (0 <= k < n). A deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column.at n=45A121748
• Number of deco polyominoes of height n, consisting only of columns of odd length. A deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column.at n=9A121749
• a(n) = 361*n^2 + 2*n.at n=9A158309
• Numbers with prime factorization pqrst^3.at n=23A189984
• Numbers n such that {largest m such that 1, 2, ..., m divide n} is different from {largest m such that m! divides n^2}.at n=21A232099
• a(n) = A000217(A232097(n)) / n!.at n=9A232101
• Triangle read by rows: T(m,n) = number of ways of distributing n distinguishable balls into m distinguishable bins of size 3 where empty bins are permitted (m >= 1, 1 <= n <= 3m).at n=25A248845
• 29-gonal pyramidal numbers: a(n) = n*(n+1)*(9*n-8)/2.at n=20A256649
• Numbers n such that the multiplicative group modulo n is the direct product of 6 cyclic groups.at n=26A272596
• a(n) = binomial(n, 2) + 6*binomial(n, 4).at n=21A327319
• a(n) = denominator of Sum_{1 <= i < j <= d(n)} 1/(d_j - d_i), sum over ordered pairs of divisors of n, where d(n) is the number of divisors of n.at n=43A330078
• Numbers that are both unitary pseudoperfect (A293188) and nonunitary pseudoperfect (A327945).at n=36A335141