A128996 Intersection of A061068 and A064270.

3, 11, 19, 79, 683, 733, 971, 1433, 1453, 2531, 3181, 3931, 4027, 4111, 4153, 4943, 6397, 6491, 6653, 6673, 6883, 8521, 8641, 8969, 10463, 10477, 10667, 11383, 11411, 11587, 12527, 13229, 15749, 16631, 17971, 21757, 21929, 24767, 27031, 28859

Offset

1,1

Comments

Primes which are equal to (some prime plus its subscript) and also to (some other prime minus its subscript). Primes of the form p(m)+m and p(n)-n, p(k) = k-th prime.

Links

Table of n, a(n) for n=1..40.

Formula

p=p(m)+m=p(n)-n for some m and some n>m.

Example

3=p(1)+1=2+1 and 3=p(4)-4=7-4 (that is m=1, n=4),
11=p(4)+4=7+4 and 11=p(8)-8=19-8 (m=4, n=8),
19=p(6)+6=13+6 and 19=p(10)-10=29-10 (m=6, n=10),
79=p(18)+18=61+18 and 79=p(28)-28=107-28 (m=18, n=28),
683=p(106)+106=577+106 and 683=p(144)-144=827-144 (m=106, n=144).

Crossrefs

Cf. A061068, A064270.

Sequence in context: A183459 A176872 A088733 * A196174 A192591 A075226

Adjacent sequences: A128993 A128994 A128995 * A128997 A128998 A128999

Keyword

nonn

Author

Zak Seidov, Apr 30 2007

Status

approved