215820
domain: N
Appears in sequences
- Coordination sequence for 4-dimensional primitive di-isohexagonal orthogonal lattice.at n=33A008530
- 1/6 of product of three numbers: n-th prime, previous and following number.at n=28A127920
- Quarter-square tetrahedrals: a(n) = k*(k - 1)*(k - 2)/6, k = A002620(n).at n=21A217482
- a(n) = binomial(3*n+2,3).at n=35A228888
- a(n) = (p+1)*(p+2)*(p+3)/6 where p is the n-th prime.at n=27A271512
- a(n) = (5*n + 3)*(5*n + 4)*(5*n + 5)/6.at n=21A300522