A105990 - OEIS

A105990

Near-repdigit semiprimes with 9 as repeated digit.

299, 699, 799, 899, 939, 949, 959, 979, 989, 993, 995, 998, 5999, 6999, 7999, 9299, 9599, 9799, 9899, 9939, 9959, 9969, 9979, 9989, 9991, 9993, 9995, 9997, 9998, 19999, 29999, 69999, 91999, 92999, 93999, 95999, 99299, 99599, 99899, 99919, 99949

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..41.

EXAMPLE

a(2)=699 is a term because 699 is a semiprime and all digits are equal to 9 except one.

CROSSREFS

Sequence in context: A235229 A064908 A341189 * A160484 A271986 A091028

Adjacent sequences: A105987 A105988 A105989 * A105991 A105992 A105993

KEYWORD

base,nonn

AUTHOR

Shyam Sunder Gupta, Apr 29 2005

STATUS

approved