173568
domain: N
Appears in sequences
- Divide natural numbers in groups with prime(n) elements and add together.at n=29A034957
- a(n) = Sum_{k=0..n} 3^k*F(k) where F(k) is the k-th Fibonacci number.at n=8A082987
- a(n) = 4*3*2*1 + 8*7*6*5 + 12*11*10*9 + 16*15*14*13 + ... + (up to the n-th term).at n=20A319868
- Product_{n>=1} 1 / (1 - a(n)*x^n/n!) = 1 + arctan(x).at n=9A353915