50952

Appears in sequences

• 3rd binomial transform of (0,1,0,2,0,4,0,8,0,16,...).at n=8A081179
• a(n) = sum of absolute-valued coefficients of (1+2*x-x^2)^n.at n=10A084776
• The number of necklaces with n beads of white and red colors, including at least three white ones.at n=18A227910