341055
domain: N
Appears in sequences
- Binomial coefficient C(5n,n-7).at n=4A004349
- Binomial coefficients C(n,51).at n=4A017715
- Binomial coefficients C(55,n).at n=4A017771
- Binomial coefficients binomial(2*n-3,4).at n=25A053126
- Pentagonal numbers (A000326) whose digit reversal is the product of 2 palindromes greater than 1.at n=31A115703
- Triangle, read by rows, where T(n,k) = C( C(n+2,3) - C(k+2,3) + 3, n-k) for n>=k>=0.at n=23A126457
- List of numbers that are both pentagonal (A000326) and binomial coefficients C(n,4) (A000332).at n=35A145920
- Pentagonal numbers that are the product of two pentagonal numbers greater than 1.at n=4A188663
- Doubly pentagonal numbers: a(n) = n*(3*n-2)*(3*n-1)*(3*n+1)/8.at n=18A232713
- Number of ways to choose 4 points in an n X n X n triangular grid.at n=7A234249
- Pentagonal numbers P = (p+q+r+s)/4 which are the arithmetic mean of four consecutive primes such that p < P < q < r < s.at n=3A234539
- Pentagonal numbers that are products of smaller pentagonal numbers.at n=7A374372