65121
domain: N
Appears in sequences
- a(n) = (1/3)*(n^2 + 2*n + 3)*(n+1)^2.at n=20A014820
- Quotients k*(k+1)*(k+2) / (k+(k+1)+(k+2)) that are lucky numbers.at n=31A032792
- Expansion of (1-x^3)/(1-2x-x^3+x^4).at n=15A052903
- Generalized Catalan numbers C(8; n).at n=5A064091
- Sixth diagonal of triangle A064094.at n=8A064302
- Crystal ball sequence for the lattice C_4.at n=10A142993
- Bisection (odd part) of number of partitions that do not contain 1 as a part A002865.at n=27A182747
- Numbers k such that 9*R_(k+2) - 7*10^k is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=19A257037