24532

Appears in sequences

• a(n) = 3*a(n-1) - 4*a(n-2) + 6*a(n-3) - 4*a(n-4), with initial terms 0,1,2,4.at n=15A136427
• Ulam's spiral (SSW spoke).at n=39A143838
• Number of line segments connecting exactly 4 points in an n x n grid of points.at n=28A177720
• Number of -1..1 arrays x(0..n+1) of n+2 elements with zero sum and nonzero second differences.at n=10A200546
• Positions of 2 in sequence A217916.at n=27A217918