27869

Appears in sequences

• a(n) = n + (n+1)^2 + (n+2)^3.at n=28A027620
• Products p^3 or p^2*q, where {p,q} are consecutive primes.at n=29A033477
• Composite numbers k+1 such that k*phi(k+1) is a perfect square.at n=25A069068
• a(n) = (2*n-1)*(2*n+1)^2.at n=14A102094
• a(n) = n*(n+2)^2.at n=29A152619
• Number of increasing sequences of n integers x(1),...,x(n) with values in 1..2*n such that x(j) divides x(k) if j divides k.at n=46A180384
• a(n) = smallest number k with property that if the base-n expansion of k is reversed, the result is a nontrivial multiple of k.at n=27A224220
• Number of partitions p of n such that (number of even numbers in p) = (number of odd numbers in p).at n=47A241638
• a(n) = 29*n^2.at n=31A244635
• Number of primes of the form b^2 + 2 for b <= 10^n.at n=5A302434
• Composite numbers k coprime to 8 such that k divides Pell(k - Kronecker(8,k)), Pell = A000129.at n=43A327651
• The smallest nonpalindromic number in base n that shares the same prime divisors as its digit reversal in base n.at n=28A371307
• Square array A(n,k), read by descending antidiagonals, where A(1, k) = A388984(k), and for n > 1, A(n, k) = A003961(A(n-1), k).at n=64A388981