A109988 3-almost primes (A014612) ordered alphabetically by where they occur in A000052.

8, 18, 50, 52, 45, 44, 42, 98, 99, 92, 70, 78, 75, 76

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. A109989 is 4-almost primes ordered alphabetically by where they occur in A000052.

Links

Table of n, a(n) for n=1..14.

Example

a(1) = 8 because eight is the first 3-almost prime in alphabetical order.
a(4) = 18 because eighteen is the first 2-digit 3-almost prime in alphabetical order.

Crossrefs

Cf. A000052, A014612, A109986, A109987.

Sequence in context: A300161 A034714 A153388 * A335440 A066721 A079704

Adjacent sequences: A109985 A109986 A109987 * A109989 A109990 A109991

Keyword

base,easy,nonn,word

Author

Jonathan Vos Post, Jul 07 2005

Status

approved