19635
domain: N
Appears in sequences
- Fibonomial coefficients: a(n) = F(n+1) * F(n+2) * F(n+3)/2, where F() = Fibonacci numbers A000045.at n=7A001655
- a(n) = floor(n(n+2)(2n+1)/8).at n=42A002717
- Odd primitive abundant numbers.at n=27A006038
- Triangle of Fibonomial coefficients, read by rows.at n=58A010048
- Triangle of Fibonomial coefficients, read by rows.at n=62A010048
- Expansion of x/(1 - 7*x - 2*x^2).at n=6A015555
- Expansion of Product_{m>=1} (1-m*q^m).at n=36A022661
- a(n) = n*(n+1)*(n+2)/2.at n=33A027480
- a(n) = n*(2*n-1)*(2*n+1).at n=17A035328
- Odd numbers with exactly 5 distinct prime factors.at n=1A046391
- Number of nonempty subsets of {1,2,...,n} in which exactly 4/5 of the elements are <= (n-2)/2.at n=24A047190
- Lonely numbers: distance to closest prime sets a new record.at n=16A051650
- Smallest number at distance n from nearest prime.at n=26A051652
- Maximal value of products of partitions of n into powers of distinct primes (powers of 1 and 2 excluded).at n=43A051704
- Smallest number at distance 2n from nearest prime.at n=13A051728
- Signed Fibonomial triangle.at n=62A055870
- Signed Fibonomial triangle.at n=58A055870
- Fibonomial coefficients.at n=3A056565
- a(n) = lcm(n, n+1, n+2, n+3)/12.at n=32A067047
- Odd primitive numbers such that n! divided by product of factorials of all proper divisors of n is not an integer.at n=24A075460