|
|
A045961
|
|
Twin A045954's (middle terms) that are primes.
|
|
1
|
|
|
3, 5, 11, 19, 43, 53, 101, 131, 139, 149, 197, 229, 373, 389, 419, 523, 547, 587, 643, 709, 739, 883, 997, 1091, 1093, 1187, 1483, 1621, 1931, 1973, 2099, 2243, 2347, 2357, 2411, 2549, 2677, 2731, 2741, 2803, 2963, 3011, 3203, 3307, 3331, 3461, 3467, 3541, 3733
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
MATHEMATICA
|
evenLuckies[max_] := Module[{lst = Range[2, max, 2], i = 2, len}, While[i <= (len = Length@lst) && (k = lst[[i]]) <= len, lst = Drop[lst, {k, len, k}]; i++]; lst]; twinMid[max_] := Module[{s = evenLuckies[max]}, Select[s[[Position[ Differences[s], 2] // Flatten]] + 1, PrimeQ]]; twinMid[3800] (* Amiram Eldar, Mar 20 2024, after Robert G. Wilson v at A045954 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|