proposed

approved

editing

proposed

<a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (0,5).

Cf. A000045, A001177., A000351 (bisection), A216491 (bisection)

nonn,easy,new

approved

editing

reviewed

approved

proposed

reviewed

editing

proposed

1, 5, 12, 25, 60, 125, 300, 625, 1500, 3125, 7500, 15625, 37500, 78125, 187500, 390625, 937500, 1953125, 4687500, 9765625, 23437500, 48828125, 117187500, 244140625, 585937500, 1220703125, 2929687500, 6103515625, 14648437500, 30517578125, 73242187500, 152587890625, 366210937500

More terms from Robert Israel, Aug 07 2017

proposed

editing

Joerg Arndt: Done.

editing

proposed

Michel Marcus: Can you add more terms to data

nonn,more,new

Robert Israel, <a href="/A289586/b289586.txt">Table of n, a(n) for n = 1..2858</a>

From Robert Israel, Aug 07 2017: (Start)

a(2*k) = 5^k for k >= 1.

a(2*k-1) = 12*5^(k-2) for k >= 2.

G.f.: (1+5*x+7*x^2)/(1-5*x^2). (End)

1, seq(op([5^k, 12*5^(k-1)]), k=1..100); # Robert Israel, Aug 07 2017