30180

Appears in sequences

• a(n) is the concatenation of n and 6n.at n=29A009440
• Numbers k such that k * (1+i)^k - i is a Gaussian prime.at n=17A058772
• Even numbers n such that n^2*2^n + 1 is prime.at n=14A058779
• Numbers k such that k^2 * 2^k + 1 is prime.at n=24A058780
• n * (1+i)^n + i is a Gaussian prime.at n=23A058782
• Multiples of 3018.at n=9A086746
• Expansion of (-1 + Product_{k>=1} 1 / (1 + (-x)^k))^10.at n=13A341253