Cousin Prime

(3, 7), (7, 11), (13, 17), (19, 23), (37, 41), (43, 47), (67, 71), (79, 83), (97, 101), (103, 107), (109, 113), (127, 131), (163, 167), (193, 197), (223, 227), (229, 233), (277, 281), (307, 311), (313, 317), (349, 353), (379, 383), (397, 401), (439, 441), (457, 461), (487, 491), (499, 503), (613, 617), (643, 647), (673, 677), (739, 743), (757, 761), (769, 773), (823, 827), (853, 857), (859, 863), (877, 891), (883, 887), (907, 911), (937, 941), (967, 971)

$B\_4\; =\; \backslash left(\backslash frac\{1\}\{7\}\; +\; \backslash frac\{1\}\{11\}\backslash right)\; +\; \backslash left(\backslash frac\{1\}\{13\}\; +\; \backslash frac\{1\}\{17\}\backslash right)\; +\; \backslash left(\backslash frac\{1\}\{19\}\; +\; \backslash frac\{1\}\{23\}\backslash right)\; +\; \backslash cdots$

B₄ ≈ 1.1970449

External links

• MathWorld: Cousin Primes

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