1040187392
domain: N
Appears in sequences
- a(n) = n*2^(n-6).at n=25A078836
- Number of subsets of {1,.., n} containing at least one square.at n=29A089888
- Second differences of A129952.at n=27A129954
- Row sums of triangle A133935.at n=27A131352
- Denominators of coefficient of x^(n+1/2) in the series expansion of the haversine.at n=15A143582
- Number of solutions to Sum_{i=1..n} x_i^2 == 0 (mod 8) with x_i in 0..7.at n=10A228921
- a(1) = 1, a(2) = 2, a(3) = 5, a(4) = 8 and a(5) = 15, a(n) = Sum_{j=1..n-1} a(j).at n=30A257548