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A072568 Even interprimes. 15
4, 6, 12, 18, 26, 30, 34, 42, 50, 56, 60, 64, 72, 76, 86, 102, 108, 120, 134, 138, 144, 150, 154, 160, 170, 176, 180, 186, 192, 198, 228, 236, 240, 246, 254, 260, 266, 270, 274, 282, 288, 300, 312, 324, 334, 342, 348, 356, 370, 376, 386, 414, 420, 426, 432 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,1

COMMENTS

The interprimes (A024675) are those integers that lie at the midpoint between consecutive odd primes.

LINKS

Table of n, a(n) for n=4..58.

Eric Weisstein's World of Mathematics, Interprime

MATHEMATICA

Select[Plus @@@ Partition[Table[Prime[n], {n, 2, 100}], 2, 1]/2, EvenQ]

CROSSREFS

Even members of A024675.

Cf. A024675, A072569, A072570, A072571, A072572, A072573.

Sequence in context: A045959 A310600 A296507 * A154965 A249630 A109290

Adjacent sequences:  A072565 A072566 A072567 * A072569 A072570 A072571

KEYWORD

easy,nonn

AUTHOR

Marco Matosic, Jun 21 2002

STATUS

approved

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Last modified July 23 19:33 EDT 2019. Contains 325263 sequences. (Running on oeis4.)