A031942 Numbers with no consecutive equal base 4 digits.

1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 13, 14, 17, 18, 19, 24, 25, 27, 28, 29, 30, 33, 34, 35, 36, 38, 39, 44, 45, 46, 49, 50, 51, 52, 54, 55, 56, 57, 59, 68, 70, 71, 72, 73, 75, 76, 77, 78, 97, 98, 99, 100, 102, 103, 108, 109, 110, 113, 114, 115

Offset

1,2

Links

Table of n, a(n) for n=1..60.

Formula

A031942 = { n | A043278(n)=1 } = A043090 \ {0}. - M. F. Hasler, Jul 23 2013

Crossrefs

Cf. A000975 (base-2 analog), A031941 or A043089 (base-3 analog), A031943 or A043091 (base-5 analog), A043092, ..., A043096 (base-6 through base-10 analog).

Sequence in context: A188042 A236842 A236860 * A043090 A317044 A267302

Adjacent sequences: A031939 A031940 A031941 * A031943 A031944 A031945

Keyword

nonn,base

Author

Clark Kimberling

Extensions

Edited by Charles R Greathouse IV, Aug 02 2010

Status

approved