44538

Appears in sequences

• Fibonacci sequence beginning 2, 16.at n=18A022370
• a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = A023532, t = (Lucas numbers).at n=20A024368
• Expansion of (1+x^4*C^4)*C^3, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.at n=9A071756
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, -1), (0, 1, 1), (1, 0, 0)}.at n=10A149841
• Number of nX4 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 0 and 1 0 1 vertically.at n=5A207804
• T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 0 and 1 0 1 vertically.at n=41A207808
• Number of 6Xn 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 0 and 1 0 1 vertically.at n=3A207811
• Number of days after Jan 01 1000 such that the date written in the ISO-8601-format YYYYMMDD is palindromic.at n=16A210883
• Numbers n such that Bernoulli number B_{n} has denominator 3318.at n=32A272383