536870882
domain: N
Appears in sequences
- Eulerian numbers (Euler's triangle: column k=2 of A008292, column k=1 of A173018).at n=29A000295
- a(n) = 2^n - A056045(n).at n=28A056200
- a(n) = 2^(n+1) - n - 2, or partial sums of main diagonal of array A125127 of k-step Lucas numbers.at n=27A125128
- Expansion of e.g.f. e^(2x)-(1+x)*e^x+x.at n=29A130103
- Number of odd permutations on {1,2,...,n} with exactly 2 weak excedances.at n=30A293047