24643

Appears in sequences

• Least m such that if r and s in {1/1, 1/4, 1/9,..., 1/n^2} satisfy r < s, then r < k/m < s for some integer k.at n=40A024827
• Decimal part of cube root of a(n) starts with 1: first term of runs.at n=27A034127
• T(n,n), array T as in A047120.at n=9A047122
• a(n) = Sum_{k=1..n} lcm(k,n)/gcd(k,n).at n=36A056789
• Composite n such that (n-1)*phi(n) is a perfect square.at n=24A069953
• Smallest integer > 1 which is both n-gonal and centered n-gonal.at n=34A072277
• Sum of terms in row n of A081520.at n=36A081519
• a(n) = 18*n^2 + 1.at n=36A157889
• a(n) = n*(n^2 - 4*n + 5)/2.at n=38A162607
• Number of (n+6)X8 0..1 matrices with each 7X7 subblock idempotent.at n=3A224582
• Number of (n+6)X10 0..1 matrices with each 7X7 subblock idempotent.at n=1A224584
• T(n,k)=Number of (n+6)X(k+6) 0..1 matrices with each 7X7 subblock idempotent.at n=11A224588
• T(n,k)=Number of (n+6)X(k+6) 0..1 matrices with each 7X7 subblock idempotent.at n=13A224588
• 37-gonal numbers: a(n) = n*(35*n-33)/2.at n=38A282852
• Number of partitions of n that contain more prime parts than nonprime parts.at n=44A355225