|
| |
|
|
A102873
|
|
Prime differences between 2^n and 3^m when they are nearly equal for n and m to 200.
|
|
0
| |
|
|
5, 7, 13, 47, 502829, 95622386615329600236050591, 31282850202880064644204601069, 463689046302626373360766753609741, 15491551101739718820967497643203613
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| The first array "c" can be used to extend A102872. d = Delete[Union[Table[If[PrimeQ[c[[n]]], c[[n]], 0], {n, 1, Length[c]}]], 1] finds the primes in this line between 2^n and 3^m.
|
|
|
FORMULA
| a(q) = If 2^n and 3^m are such that 2^n>3^n and Floor[2^n/3^m]<2 and when Abs[2^n-3^m] if prime, then a[q]=Abs[2^n-3^m]
|
|
|
MATHEMATICA
| c = Delete[Union[Flatten[Table[Table[If [ (2^n > 3^m) && Floor[2^n/3^m] < 2, Abs[2^n - 3^m], 0], {m, 1, n}], {n, 1, 200}], 1]], 1] d = Delete[Union[Table[If[PrimeQ[c[[n]]], c[[n]], 0], {n, 1, Length[c]}]], 1]
|
|
|
CROSSREFS
| Sequence in context: A109904 A077781 A102872 * A158892 A106022 A050085
Adjacent sequences: A102870 A102871 A102872 * A102874 A102875 A102876
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Roger Lee Bagula (rlbagulatftn(AT)yahoo.com), Mar 01 2005
|
|
|
EXTENSIONS
| Is this well-defined? "Up to 200" bothers me. - N. J. A. Sloane (njas(AT)research.att.com).
|
| |
|
|
