111891

Appears in sequences

• Quadrinomial coefficients: C(2+n,n) + C(3+n,n) + C(4+n,n).at n=37A005718
• a(n) = a(n-2) + a(n-3), with a(0) = 3, a(1) = 2, a(2) = 6.at n=38A046877
• Numbers k such that k and k^2 use only the digits 1, 2, 5, 8 and 9.at n=15A137011