82250

Appears in sequences

• Number of similarity classes of triangles which can be drawn using the lattice points in an n X n grid for vertices.at n=28A028492
• a(n) = binomial(n+5,4) - 1.at n=34A063258
• a(n)= Sum_{d divides n} a(abs(n/d-d)).at n=17A079580
• a(n) = pg(n, 3) + pg(n, 4) + ... + pg(n, n) where pg(n, m) is the m-th n-th-order polygonal number.at n=27A245679
• Numbers k such that (754*10^k - 7)/9 is prime.at n=25A294634
• Record gaps between prime octuplets of the form p + {0, 2, 6, 12, 14, 20, 24, 26} (initial members are A022012), divided by 30.at n=2A347850
• Least k > a(n-1) such that k + the sum of all previous terms = 0 (mod (k-2)), with a(1)=1 and a(2)=2.at n=23A390783