17797573

Properties

Appears in sequences

• a(n) = 2*a(n-1) + 9*a(n-2), with a(0) = 0, a(1) = 1.at n=13A002534
• Starting with the fraction 1/1, prime denominators of fractions built according to the rule: add top and bottom to get the new bottom, add top and 10 times bottom to get the new top.at n=3A111016
• Prime numbersat n=1139217