49136

Appears in sequences

• Related to Euler numbers, expansion of e.g.f. sec(x)*tan^2(x).at n=6A002735
• a(n) = n*(3*n^2 - 1)/2.at n=32A004188
• Number of down-up permutations of n+3 starting with n+1.at n=8A006212
• Triangle of Euler-Bernoulli or Entringer numbers read by rows: T(n,k) is the number of down-up permutations of n+1 starting with k+1.at n=52A008282
• Read across rows of Euler-Bernoulli or Entringer triangle.at n=35A008283
• Triangle of Euler-Bernoulli or Entringer numbers.at n=47A010094
• Triangle in which rows are permutations of the rows of A008282.at n=49A064192
• a(n) = 3*2^n - n - 2.at n=14A079583
• a(n) = n! * [x^n] 2*(tan(x))^2*(sec(x) + tan(x)).at n=8A164575
• a(n) = 3*a(n-1) - 2*a(n-2) with a(0)=32 and a(1)=80.at n=10A182466
• a(n) = 36*n^2 - 4*n (n>=1).at n=36A304380