39833

Appears in sequences

• Number of 3 X n binary matrices with no zero rows or columns, up to row and column permutation.at n=19A055609
• Number of positive meanders (walks starting at the origin and ending at any altitude > 0 that never touch or go below the x-axis in between) with n steps from {-2,-1,1,2}.at n=9A278394
• Expansion of e.g.f. (1/x) * Series_Reversion( x * (1 - x)^3 * exp(-x) ).at n=4A377833