3981312

Appears in sequences

• Orders of finite Abelian groups having the incrementally largest numbers of nonisomorphic forms (A046054).at n=31A046055
• Numbers that are the product of their digits raised to positive integer powers.at n=33A059405
• 19-almost primes (generalization of semiprimes).at n=13A069280
• 3 people at a party are saying Hello to each other. Person 1 says Hello. Person 2 counts the times Hello has been said and says Hello twice that number. Person 3 says Hello 3 times the sum of Hello's and then it is Person 1 again. This is how many Hello's each person says.at n=15A076505
• Expansion of x*(1+3*x+12*x^2)/(1-24*x^3).at n=14A076506
• Expansion of 3*x*(1-x)*(1+2*x+6*x^2)/(1-24*x^3).at n=14A076509
• a(n) = if n mod 2 = 1 then n^3*(n-1)^2/2 else n^5/2.at n=24A122658
• Number of compositions of even natural numbers into 5 parts <= n.at n=23A191484
• Number of compositions of odd positive integers into 5 parts <= n.at n=23A191902
• Numbers which can be written using their digits in order and only multiplication and squaring operators.at n=15A194766
• Numbers k such that k*product_of_digits(k) is a nonzero cube.at n=32A229544
• Numerator of Product_{k=1..n-1} (1 + 1/prime(k)).at n=9A236435
• Number of length n+5 0..2 arrays with no six consecutive terms having two times the sum of any two elements equal to the sum of the remaining four.at n=13A249227
• Numbers k such that k^4 is the sum of two positive 5th powers.at n=12A291852
• Fixed points of A256739, Xor-Moebius transform of natural numbers.at n=51A297107
• Product of Omegas of positive integers from 2 to n.at n=26A327486
• a(n) = Product_{d|n} lcm(d, tau(d)) where tau(k) is the number of divisors of k (A000005).at n=23A334795
• Square array T(n,k), n >= 1, k >= 1, read by antidiagonals, where T(n,k) is the number of spanning trees in the n X k king graph.at n=29A338029
• Square array T(n,k), n >= 1, k >= 1, read by antidiagonals, where T(n,k) is the number of spanning trees in the n X k king graph.at n=34A338029
• Number of spanning trees in the n X 2 king graph.at n=6A338100