A036340 Concatenation of prime p and nextprime(p) is prime -> cycles of 3 steps possible.

467, 941, 959941, 3396199, 4858943, 5696101, 6475643, 7566133, 7584253, 7592261, 9305281, 9463877, 11430491, 13442243, 14374837, 15941473, 17414497, 17691997, 19584223, 21421849, 22310159, 22808459, 27601163, 29198881

Offset

0,1

Comments

Terms from 3396199 up to 17691997 found by Jo Yeong Uk (hyukjo(AT)sigma.chungnam.ac.kr).

Links

Table of n, a(n) for n=0..23.

Carlos Rivera, Puzzle 29. Pi = P i-1&nxtprm(P i-1), Pi = prime for i => 1, The Prime Puzzles & Problems Connection.

Crossrefs

Cf. A030459, A034593, A036339, A036341.

Sequence in context: A273808 A034593 A036339 * A059395 A266163 A221238

Adjacent sequences: A036337 A036338 A036339 * A036341 A036342 A036343

Keyword

nonn,base

Author

Patrick De Geest, Dec 15 1998

Status

approved