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A247861 Prime sieve of Phi. 3
1, 80, 3988, 49, 4848, 4, 86, 6, 8, 7720309, 62862, 54486, 526046, 890244, 0, 20, 893, 48, 540, 17, 38622, 5369, 31800, 6, 54, 86, 958, 56, 226, 92, 0, 5, 2501, 3, 43216, 548626296, 61, 8, 7, 1, 40805, 9544, 492, 8, 5364864, 443, 344, 495658, 88, 8, 39, 254, 706, 15884607, 88712, 5, 7, 41662, 40, 0, 2, 7, 77, 15, 14, 1704666 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Manfred Scheucher, Table of n, a(n) for n = 1..385

Manfred Scheucher, Sage Script

EXAMPLE

Find the first occurrence of prime 2 in the digits of Phi (only 40 digits in this illustration):

161803398874989484820458683436563811772..., and replace it with a space:

1618033988749894848 0458683436563811772...  Repeat the process with 3:

16180 3988749894848 0458683436563811772...  Then 5:

16180 3988749894848 04 8683436563811772...  Then 7:

16180 3988 49894848 04 8683436563811772...  Then 11, 13, 17, etc., until the first occurrence of every prime is eliminated from the digits of Phi.

1  80 3988 49  4848 04 86    6   8  772...  Then consolidate gaps between the remaining digits into a single comma:

1,80,3988,49,4848,4,86,6,8,7720309,...      to produce the first terms in the prime sieve of Phi.

CROSSREFS

Cf. A001622, A247747, A245770.

Sequence in context: A286789 A264372 A004390 * A203171 A076004 A216987

Adjacent sequences:  A247858 A247859 A247860 * A247862 A247863 A247864

KEYWORD

nonn,easy

AUTHOR

Gil Broussard, Sep 25 2014

EXTENSIONS

Corrected and extended by Manfred Scheucher, Jun 05 2015

STATUS

approved

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Last modified August 25 14:35 EDT 2019. Contains 326324 sequences. (Running on oeis4.)