8589934558

Appears in sequences

• Eulerian numbers (Euler's triangle: column k=2 of A008292, column k=1 of A173018).at n=33A000295
• Semiprimes of the form 2^k-k-1.at n=8A099442
• a(n) = Sum_{k=0..n} (1-(-1)^( floor( (-n-k)/2^k ) )) * 2^(k-1).at n=32A105229
• a(n) = 2^(n+1) - n - 2, or partial sums of main diagonal of array A125127 of k-step Lucas numbers.at n=31A125128
• Number of odd permutations on {1,2,...,n} with exactly 2 weak excedances.at n=34A293047