A114111 - OEIS

%I #9 Jul 28 2022 09:06:27

%S 1,2,3,5,7,11,13,19,29,31,33,35,37,39,41,67,69,71,73,75,77,9687,9689,

%T 9691,9693,9695,9697,9699,9701,9703,9705,9707,9709,9711,9713,9715,

%U 9717,9719,9721,9723,9725,9727,9729,9731,9733,9735,9737,9739,9741,9743,9745

%N Where records occur in A111390.

%F Conjectures from _Chai Wah Wu_, Jul 27 2022: (Start)

%F a(n) = 2*a(n-1) - a(n-2) for n > 23.

%F G.f.: x*(-9608*x^22 + 9608*x^21 - 24*x^16 + 24*x^15 - 8*x^9 + 4*x^8 + 4*x^7 - 2*x^6 + 2*x^5 + x^3 + 1)/(x - 1)^2. (End)

%Y Cf. A111390, A114110.

%K nonn

%O 1,2

%A _Klaus Brockhaus_, Nov 13 2005, Jan 01 2006