17995

Appears in sequences

• Number of partitions of n in which the least part is even.at n=47A026805
• At stage 1, start with a unit square. At each successive stage add 4*(n-1) new squares around outside with edge-to-edge contacts. Sequence gives number of squares (regardless of size) at n-th stage.at n=29A056640
• Numbers n such that 2*10^n + 6*R_n + 3 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=18A102957
• Number of squares in the interior of the square with vertices (n,0), (0,n), (-n,0) and (0,-n) in a square (x,y)-grid.at n=29A111746
• Numbers k such that (10^k*361 - 163)/9 is prime (k > 0).at n=11A287351
• a(n) = 4*p(n-1)*p(n+1) - p(n)^2, where p(k) = k-th prime.at n=20A327447
• Number of integer partitions of n whose parts have weakly decreasing numbers of prime factors (A001222).at n=40A358909