A133022 Product of n-th Fibonacci number and n-th Fibonacci number written backwards.

0, 1, 1, 4, 9, 25, 64, 403, 252, 1462, 3025, 8722, 63504, 77356, 291421, 9760, 778743, 12697747, 12537568, 7584334, 38398140, 710406346, 208476181, 2168819074, 4004525952, 3905576425, 47722137553, 160019976838, 37728297243, 474332543035, 33479625520

Offset: 0

Author

Omar E. Pol, Nov 07 2007

Keywords

• base
• easy
• nonn

Examples

			403 = 13*31.
		

Links

• G. C. Greubel, Table of n, a(n) for n = 0..1000

Crossrefs

Cf. A000045, A004091, A061205, A133019.

Programs

Maple

a:= n-> (f-> (s-> f*parse(cat(s[-i]$i=1..length(s))))(
          ""||f))(((<<0|1>, <1|1>>^n)[1, 2])):
seq(a(n), n=0..30);  # Alois P. Heinz, Apr 06 2018

Mathematica

#*FromDigits[Reverse[IntegerDigits[#]]]&/@Fibonacci[Range[0,40]] (* Harvey P. Dale, Oct 12 2012 *)

Formula

a(n) = A000045(n) * A004091(n).

Extensions

Corrected and extended by Harvey P. Dale, Oct 12 2012