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A039790 Prime numbers prefixed with a '1'. 1
12, 13, 15, 17, 111, 113, 117, 119, 123, 129, 131, 137, 141, 143, 147, 153, 159, 161, 167, 171, 173, 179, 183, 189, 197, 1101, 1103, 1107, 1109, 1113, 1127, 1131, 1137, 1139, 1149, 1151, 1157, 1163, 1167, 1173, 1179, 1181, 1191, 1193, 1197, 1199, 1211 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Replace every prime by the concatenation of its divisors. [Lekraj Beedassy, May 29 2009]

LINKS

David F. Marrs, Table of n, a(n) for n = 1..10000

Kevin N. Stone, What number comes next in this sequence, BrainBashers

FORMULA

a(n) = A037278(A000040(n)). [Lekraj Beedassy, May 29 2009]

CROSSREFS

Cf. A000040, A037278.

Sequence in context: A262210 A074164 A076085 * A242912 A102496 A267615

Adjacent sequences:  A039787 A039788 A039789 * A039791 A039792 A039793

KEYWORD

nonn,base,dumb

AUTHOR

Kevin N. Stone (kevin.stone(AT)brainbashers.com)

STATUS

approved

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Last modified July 14 18:26 EDT 2020. Contains 335729 sequences. (Running on oeis4.)