192660
domain: N
Appears in sequences
- 4-dimensional pyramidal numbers: a(n) = n^2*(n^2-1)/12.at n=39A002415
- a(n) is the number of sets of natural numbers [a,b,c,d,e] that can be produced with the numbers [0..n] such that the values of all the distinct parenthesized expressions of a-b-c-d-e are different.at n=12A054026
- Smallest k such that k*prime(i)+1 is prime for i = 1 to n.at n=7A084700
- a(n) = smallest positive m such that k*m+1 is prime for k=2..n.at n=6A173750
- Number of n X 5 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 0 1 vertically.at n=14A207166
- a(n) = n*(n+1)*(7*n-6)/2.at n=38A256718
- Number of 3-cycles in the n X n black bishop graph.at n=39A289161
- a(n) = (1/12)*n^2*(3*(1 + n^2) - 2*(2 + n^2)*(n mod 2)).at n=39A322844
- Number of parts in all twice partitions of n where both partitions are strict.at n=25A327605
- Number of 4-cycles in the n X n white bishop graph.at n=38A367993