login
A109989
4-almost primes (A014613) ordered alphabetically by where they occur in A000052.
1
88, 84, 81, 54, 56, 40, 90
OFFSET
1,1
COMMENTS
A109986 is primes ordered alphabetically by where they occur in A000052. A109987 is semiprimes ordered alphabetically by where they occur in A000052. A109988 is 3-almost primes ordered alphabetically by where they occur in A000052.
EXAMPLE
a(1) = 88 because eighty-eight is the first 4-almost prime in alphabetical order, there being no 1-digit 4-almost primes.
a(2) = 84 because eighty-four is the second 2-digit 4-almost prime in alphabetical order.
CROSSREFS
KEYWORD
base,easy,nonn,word
AUTHOR
Jonathan Vos Post, Jul 07 2005
STATUS
approved