A039435 Numbers whose base-10 representation has the same nonzero number of 7's and 8's.

78, 87, 178, 187, 278, 287, 378, 387, 478, 487, 578, 587, 678, 687, 708, 718, 728, 738, 748, 758, 768, 780, 781, 782, 783, 784, 785, 786, 789, 798, 807, 817, 827, 837, 847, 857, 867, 870, 871, 872, 873, 874, 875, 876, 879, 897, 978, 987, 1078, 1087

Offset

1,1

Links

Table of n, a(n) for n=1..50.

Mathematica

Select[Range[1100], DigitCount[#, 10, 7]==DigitCount[#, 10, 8]>0&] (* Harvey P. Dale, Mar 16 2023 *)

Crossrefs

Sequence in context: A217006 A053083 A246487 * A043258 A044038 A025386

Adjacent sequences: A039432 A039433 A039434 * A039436 A039437 A039438

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved