3848222

Appears in sequences

• a(n) = (1/2)*(binomial(2n, n) - binomial(2n-2, n-1)).at n=11A024482
• a(n) = number of (s(0), s(1), ..., s(n)) such that s(i) is a nonnegative integer and |s(i) - s(i-1)| = 1 for i = 1,2,...,n and s(0) = 2. Also a(n) = sum of numbers in row n+1 of array T defined in A026009.at n=23A026010
• Expansion of (1+x)/(1-x)^12.at n=13A057788
• a(n) = binomial(2n-3,n-1) + binomial(2n-2,n-2).at n=12A097613