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A045137
Numbers whose base-4 representation contains no 2's and exactly four 3's.
0
255, 511, 831, 895, 975, 991, 1011, 1015, 1020, 1021, 1279, 1535, 1855, 1919, 1999, 2015, 2035, 2039, 2044, 2045, 3135, 3199, 3279, 3295, 3315, 3319, 3324, 3325, 3391, 3455, 3535, 3551, 3571, 3575, 3580, 3581, 3855, 3871
OFFSET
1,1
CROSSREFS
Cf. A007090.
Sequence in context: A031469 A045065 A158250 * A329489 A045113 A143035
KEYWORD
nonn,base
STATUS
approved