A044725 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A044725

Numbers n such that string 1,2 occurs in the base 10 representation of n but not of n+1.

12, 112, 129, 212, 312, 412, 512, 612, 712, 812, 912, 1012, 1112, 1129, 1299, 1312, 1412, 1512, 1612, 1712, 1812, 1912, 2012, 2112, 2129, 2212, 2312, 2412, 2512, 2612, 2712, 2812, 2912, 3012, 3112, 3129, 3212, 3312, 3412

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

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..39.

CROSSREFS

Sequence in context: A044344 A130838 A225189 * A265948 A016152 A089700

Adjacent sequences: A044722 A044723 A044724 * A044726 A044727 A044728

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved