756000

Appears in sequences

• Triangle with a(n,1) = n and a(n,k) = a(n,k-1) * a(n-1,k-1).at n=24A064319
• a(n) = n*(n-1)^3*(n-2)^3*(n-3).at n=7A064321
• Numbers whose set of base 15 digits is {0,E}, where E base 15 = 14 base 10.at n=24A097261
• a(n) = n! * Sum_{k=1..floor(n/2)} 1/k.at n=8A101609
• Number of n X n real symmetric (0,1)-matrices having minimal determinant (=A118998(n)).at n=8A119006
• a(n) = n^5 - n^3.at n=15A133754
• Triangle T(n, k) = n!*StirlingS2(n, k)/binomial(n, k), read by rows.at n=41A156815
• The sum of the two numbers in an amicable pair, A002025(n) + A002046(n).at n=25A180164
• Triangle read by rows, based on expansion of (x^2/(exp(x)-1))^m = x^m+sum(n>m T(n,m)*m!/((n-m)!*n!)*x^n).at n=47A191578
• Numbers n such that there are three distinct triples (k, k+n, k+2n) of squares.at n=21A222154
• Numbers n such that there exists an x!=n that makes {x,x,x,n} an amicable multiset.at n=0A259305
• The sum (in nondecreasing order) of the two numbers in an amicable pair.at n=25A259953
• Numbers y such that there exists a pair x, n, with x < y, x != n and y != n that makes {x,y,n,n} an amicable multiset.at n=0A273971
• Number of permutations of [n] such that for each cycle c the smallest integer interval containing all elements of c has at most eight elements.at n=10A276842
• Filter-sequence for Stern polynomials: Least number with the same prime signature as A260443(n).at n=51A278243
• Odd bisection of A278243: a(n) = A046523(A277324(n)).at n=25A284573
• Number of unrooted labeled 4-cactus graphs on 3n+1 nodes.at n=3A287890
• Triangle read by rows: T(n,k) (n>=1, 4<=k<=n+3) is the number of k-sequences of balls colored with at most n colors such that exactly three balls are of a color seen previously in the sequence.at n=19A292879
• Triangle read by rows, a generalization of the Bernoulli numbers, the denominators for n>=0 and 0<=k<=n.at n=51A292901
• a(n) = Product_{d|n, d<n} A019565(A289813(d)); a product obtained from the 1-digits present in ternary expansions of proper divisors of n.at n=79A293221