217413

Appears in sequences

• a(n) = (n+1)*(n+2)*(n+3)*(9n+4)/24.at n=26A051798
• n coded as binary word of length=n with k-th bit set iff k is prime (1<=k<=n), decimal value.at n=18A072762
• Numerator of sum_{k=1..n} 1/2^prime(k).at n=7A121240