A039550 - OEIS

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A039550

Numbers whose base-12 representation has the same nonzero number of 7's and 9's.

93, 115, 237, 259, 381, 403, 525, 547, 669, 691, 813, 835, 957, 979, 1017, 1029, 1041, 1053, 1065, 1077, 1089, 1113, 1116, 1117, 1118, 1119, 1120, 1121, 1122, 1124, 1126, 1127, 1137, 1149, 1245, 1267, 1303, 1315, 1327, 1339, 1351, 1363

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

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..42.

MATHEMATICA

Select[Range[1500], DigitCount[#, 12, 7]==DigitCount[#, 12, 9]>0&] (* Harvey P. Dale, Oct 18 2016 *)

CROSSREFS

Sequence in context: A033413 A118131 A020320 * A167776 A099019 A082131

Adjacent sequences: A039547 A039548 A039549 * A039551 A039552 A039553

KEYWORD

nonn,base,easy

AUTHOR

Olivier Gérard

STATUS

approved