A043450 Numbers having two 7's in base 8.

63, 127, 191, 255, 319, 383, 447, 455, 463, 471, 479, 487, 495, 503, 504, 505, 506, 507, 508, 509, 510, 575, 639, 703, 767, 831, 895, 959, 967, 975, 983, 991, 999, 1007, 1015, 1016, 1017, 1018, 1019, 1020, 1021, 1022, 1087, 1151

Offset

1,1

Links

Harvey P. Dale, Table of n, a(n) for n = 1..2500

Mathematica

Select[Range[1200], DigitCount[#, 8, 7]==2&] (* Harvey P. Dale, Jan 16 2026 *)

Crossrefs

Cf. A007094.

Sequence in context: A023720 A031468 A045064 * A031491 A044250 A044631

Adjacent sequences: A043447 A043448 A043449 * A043451 A043452 A043453

Keyword

nonn,base

Author

Clark Kimberling

Status

approved