A246430 Smallest number m such that the n-th prime is the median prime factor of 1..m, cf. A212300.

1, 7, 21, 43, 79, 119, 185, 249, 333, 431, 535, 655, 773, 907, 1061, 1213, 1389, 1563, 1757, 1959, 2165, 2399, 2643, 2897, 3153, 3425, 3683, 3987, 4309, 4631, 4979, 5287, 5653, 6009, 6377, 6749, 7149, 7539, 7941, 8359, 8797, 9227, 9693, 10159, 10635, 11117

Offset

1,2

Comments

A212300(a(n)) = A000040(n).

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..120

Prog

(Haskell)
import Data.List (elemIndex); import Data.Maybe (fromJust)
a246430 = (+ 1) . fromJust . (`elemIndex` a212300_list) . a000040

Crossrefs

Cf. A212300, A000040.

Sequence in context: A380279 A077354 A387626 * A387625 A256051 A388000

Adjacent sequences: A246427 A246428 A246429 * A246431 A246432 A246433

Keyword

nonn

Author

Reinhard Zumkeller, Sep 01 2014

Status

approved