54589

Appears in sequences

• a(n) = a(n-2) + a(n-3), with a(0) = 0, a(1) = 1, a(2) = 4.at n=38A007309
• a(n) = T(n,0) + T(n,1) + ... + T(n,[ n/2 ]), T given by A026692.at n=15A026700
• Becomes prime after n iterations of f(x) = phi(x)+1 (least inverse of A039651).at n=14A039652
• Number of (w,x,y,z) with all terms in {1,...,n} and w^2<x*y*z.at n=16A212063
• Number of 3 X n 0..1 arrays with every element equal to 0, 1, 2, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=8A303017
• Numbers k such that primorial base expansion of A276086(k) has the primorial base expansion of A003415(k) as its suffix, where A003415 is the arithmetic derivative, and A276086 is the primorial base exp-function.at n=24A383933