27810

Appears in sequences

• a(n) = Sum_{k=0..m} (k+1) * A026148(n, k), where m=0 for n=1; m=n+1 for n >= 2.at n=8A027333
• Numbers k such that 161*2^k-1 is prime.at n=22A050832
• Numbers k such that 80*R_k + 1 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=15A056664
• Number of disconnected regular simple graphs on n vertices with girth at least 4.at n=24A185214
• Numbers a = b + c where a, b, and c contain the same decimal digits.at n=34A203024
• a(1) = 24603, a(n) = n*a(n-1) but products that are not in A010784 are first reduced as in A320486 (see comments); continue until zero is reached.at n=9A321148
• a(n) is the smallest number that can be partitioned into n ways as the sum of two brilliant numbers (A078972).at n=24A338474
• G.f. A(x) satisfies: A(x) = x + x^2 * A(x/(1 - 5*x)) / (1 - 5*x).at n=8A351132
• Numbers that are the sum of some number of consecutive prime cubes.at n=42A352423
• Consecutive states of the linear congruential pseudo-random number generator (625*s + 6571) mod 31104 when started at s=1.at n=35A385279