524268

Appears in sequences

• Eulerian numbers (Euler's triangle: column k=2 of A008292, column k=1 of A173018).at n=19A000295
• Distinct elements occurring in triangle of Eulerian numbers (sorted).at n=30A030196
• a(n) = 2^n - A056045(n).at n=18A056200
• a(n) = Sum_{k=0..n} (1-(-1)^( floor( (-n-k)/2^k ) )) * 2^(k-1).at n=18A105229
• a(n) = 2^(n+1) - n - 2, or partial sums of main diagonal of array A125127 of k-step Lucas numbers.at n=17A125128
• Eulerian numbers A000295 appearing in the intersection of Fibonacci and Lucas sequences A124168 and A127208.at n=2A127232
• Expansion of e.g.f. e^(2x)-(1+x)*e^x+x.at n=19A130103
• If an array is made of columns of -nacci sequences (Fibonacci, tribonacci, etc.), all starting with 1,1,2,..., the NW-to-SE diagonals can be extended by computation. This sequence is diagonal 6. See A159741 for details.at n=14A159742
• Fibonacci 16-step numbers, a(n) = a(n-1) + a(n-2) + ... + a(n-16).at n=20A249169
• Number of odd permutations on {1,2,...,n} with exactly 2 weak excedances.at n=20A293047