A043237 Numbers k such that 2 and 7 occur juxtaposed in the base-10 representation of k but not of k-1.

27, 72, 127, 172, 227, 270, 327, 372, 427, 472, 527, 572, 627, 672, 720, 772, 827, 872, 927, 972, 1027, 1072, 1127, 1172, 1227, 1270, 1327, 1372, 1427, 1472, 1527, 1572, 1627, 1672, 1720, 1772, 1827, 1872, 1927, 1972, 2027

Offset

1,1

Links

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

Crossrefs

Sequence in context: A116302 A181976 A039414 * A044017 A147651 A325824

Adjacent sequences: A043234 A043235 A043236 * A043238 A043239 A043240

Keyword

nonn,base

Author

Clark Kimberling

Status

approved