A043252 Numbers k such that 5 and 7 occur juxtaposed in the base-10 representation of k but not of k-1.

57, 75, 157, 175, 257, 275, 357, 375, 457, 475, 557, 570, 657, 675, 750, 775, 857, 875, 957, 975, 1057, 1075, 1157, 1175, 1257, 1275, 1357, 1375, 1457, 1475, 1557, 1570, 1657, 1675, 1750, 1775, 1857, 1875, 1957, 1975, 2057

Offset

1,1

Links

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

Crossrefs

Sequence in context: A336330 A230956 A039429 * A044032 A104760 A106662

Adjacent sequences: A043249 A043250 A043251 * A043253 A043254 A043255

Keyword

nonn,base

Author

Clark Kimberling

Status

approved