50439

Appears in sequences

• Sum along upward diagonal of Pascal triangle to halfway point.at n=25A010754
• Indices of primes at which the prime race 4k-1 vs. 4k+1 is tied.at n=26A038691
• T(n,n-6), array T as in A038738.at n=6A038743
• a(n) = T(2n,n), array T as in A038738.at n=6A038744
• T(n,n-6), array T as in A038792.at n=19A038796
• Numbers n such that (i) the sum of the distinct primes dividing n is divisible by the largest prime dividing n and (ii) n has exactly 4 distinct prime factors and (iii) n is squarefree.at n=20A071143
• a(n) = 7 + floor(Sum_{j=1..n-1} a(j) / 2).at n=22A120136
• Numbers k such that k divides 1 + Sum_{j=1..k} prime(j)^5 = 1 + A122103(k).at n=19A128169
• Numbers k such that omega(k) = 4 and the largest prime factor of k equals the sum of its remaining distinct prime factors, where omega(k) = A001221(k).at n=31A383728