The On-Line Encyclopedia of Integer Sequences (OEIS)

A105936 revision #8

A105936

3-almost primes of the form prime(n) + prime(n+1).

8, 12, 18, 30, 42, 52, 68, 78, 138, 172, 186, 222, 258, 268, 410, 434, 508, 548, 618, 668, 762, 772, 786, 892, 906, 946, 978, 1002, 1030, 1132, 1334, 1374, 1446, 1542, 1606, 1758, 1866, 1878, 1948, 2006, 2022, 2252, 2334, 2414, 2452, 2468, 2486, 2572, 2588

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OFFSET

1,1

COMMENTS

Minimal "almost prime" of the form prime(n) + prime(n+1).

Intersection of A001043 and A014612 :

a(1) = A001043(2) = A014612(1),

a(2) = A001043(2) = A014612(2). - Zak Seidov, Jan 31 2017

LINKS

Zak Seidov, Table of n, a(n) for n = 1..1000

Eric Weisstein's World of Mathematics, Almost Prime.

FORMULA