A031122 Integers that appear as ratios of Fibonacci numbers F(kn)/F(k), but omitting Fibonacci numbers F(n)/F(1) and Lucas numbers F(2n)/F(n).

17, 48, 72, 122, 305, 323, 329, 842, 1292, 1353, 2208, 2255, 5473, 5777, 5796, 15005, 15128, 15456, 23184, 24447, 39602, 98209, 103683, 103729, 104005, 105937, 166408, 271442, 416020, 439128, 709805, 710648, 726103, 1762289

Offset: 1

Author

Dan Hoey

Keywords

• nonn
• easy

Links

• T. D. Noe, Table of n, a(n) for n=1..1000

Crossrefs

Cf. A031121.

Programs

PARI

a031122(mk,mn,x) = local(v,vv,j,i); v=[]; for(k=3,mk, for(n=3,mn,v=concat(v,[fibonacci(k*n)/fibonacci(k)]))); v=vecsort(v); vv=[v[1]]; for(j=2,matsize(v)[2], if(v[j-1]Klaus Brockhaus, Oct 20 2001

Extensions

Corrected and extended by Don Reble, Oct 20 2001