201761
domain: N
Appears in sequences
- Number of diagonal dissections of an n-gon into 3 regions.at n=37A033275
- Bisection (odd part) of Chebyshev sequence with Diophantine property.at n=5A077249
- Combined Diophantine Chebyshev sequences A077249 and A077251.at n=11A077410
- Numbers j such that 24*(j^2) + 25 = k^2.at n=17A106331
- Numbers such that the sum of the squares of the largest and the smallest prime divisor equals the sum of the squares of the other distinct prime divisors.at n=6A199857
- Number of 6-ascent sequences of length n with no consecutive repeated letters.at n=7A264911
- a(n) = (n-1)*(n-2)*(n+3)*(n+2)/12.at n=39A299120