108541

Properties

Appears in sequences

• a(n) = a(n-1) + R(a(n-2)) + R(a(n-3)) + R(a(n-4)) where a(1) = a(2) = a(3) = a(4) = 1 and R(n) (A004086) is the reverse of n.at n=16A074865
• a(n) = the number of ways in which n is equal to the sum of digits > 0 taken from numbers <= n.at n=18A245438
• Expansion of (x^4 + 2*x^3 + 7*x^2 - 6*x + 1)^(-1/2).at n=9A299443
• Prime numbersat n=10324