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A109986 Primes ordered alphabetically by where they occur in A000052. 4
5, 7, 3, 2, 89, 83, 11, 59, 53, 41, 47, 43, 19, 97, 17, 79, 71, 73, 61, 67, 13, 31, 37, 29, 23, 881, 887, 883, 811, 859, 857, 853, 809, 877, 863, 839, 829, 821, 827, 823, 587, 557, 541, 547, 509, 599, 593, 571, 577, 569, 563, 503, 521, 523, 487, 457, 449, 443 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A109987 is semiprimes ordered alphabetically by where they occur in A000052. A109988 is 3-almost primes ordered alphabetically by where they occur in A000052.

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

EXAMPLE

a(1) = 5 because five is the first prime in alphabetical order.

a(5) = 89 because eighty-nine is the first 2-digit prime in alphabetical order.

MAPLE

V:= [seq(select(isprime, [$10^i..10^(i+1)-1]), i=0..3)]:

seq(op(V[i][sort(map(convert, V[i], english, 'And'),

output=permutation)]), i=1..nops(V)); # Robert Israel, Jun 17 2016

MATHEMATICA

alph = Last /@ Import["https://oeis.org/A000052/b000052.txt", "Table"]; Take[

Select[alph, PrimeQ], 58] (* Giovanni Resta, Jun 17 2016 *)

CROSSREFS

Cf. A000040, A000052, A109987, A109988.

Sequence in context: A058176 A155158 A241140 * A245741 A175473 A180079

Adjacent sequences:  A109983 A109984 A109985 * A109987 A109988 A109989

KEYWORD

base,easy,nonn,word

AUTHOR

Jonathan Vos Post, Jul 07 2005

EXTENSIONS

Corrected and extended by Giovanni Resta, Jun 17 2016

STATUS

approved

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Last modified July 5 07:44 EDT 2020. Contains 335462 sequences. (Running on oeis4.)