135660

Appears in sequences

• a(n) = 5*binomial(n, 6).at n=19A000910
• Seventh column (m=6) of (1,4)-Pascal triangle A095666.at n=16A095669
• Numbers taking exactly 21 steps to reach 15 in A086793.at n=3A119397
• a(n) = prime(prime(prime(prime(A028815(n) - 1) - 1) - 1) - 1) - 1.at n=16A141132
• a(n) = Carmichael(F(n)), where F(n) are the Fibonacci numbers.at n=33A181091
• Numbers with prime factorization pqrstu^2.at n=11A189985
• Triangle read by rows: T(n,k) = binomial(2*n+1, 2*k+1)*binomial(2*n-2*k, n-k)/(n+1-k) for 0 <= k <= n.at n=51A281000
• G.f.: Limit_{K->oo} Sum_{n=-oo..+oo} x^(n-K) * (1 - x^n + n*(n+1)/6 * x^(n+K))^n.at n=66A292177
• Aliquot-like sequence based on the largest aliquot divisor of the sum of divisors of n (A371418) that starts with 222.at n=36A371423