200287domain: NAppears in sequencesNumber of n-node rooted identity trees of height 5.at n=22A038089Expansion of (1+2*x+4*x^2+8*x^3+16*x^4)/(1-x-32*x^6).at n=17A098583Smallest n-digit number e such that there exists a primitive Pythagorean n-digit quintuple (a,b,c,d,e) with 10^(n-1) <= a < b < c < d < e < 10^n.at n=5A380729