| 6, 12, 13, 24, 25, 26, 27, 48, 49, 50, 51, 52, 53, 54, 55, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
FORMULA
|
a(2n) = 2a(n), a(2n+1) = 2a(n) + 1 + 5[n==0].
a(n) = n + 5 * 2^floor(log2(n)) = A004757(n) + A053644(n).
|
|
EXAMPLE
|
26 in binary is 11010, so 26 is in sequence.
|
|
PROGRAM
|
(PARI) a(n)=n+5*2^floor(log(n)/log(2))
|
|
CROSSREFS
|
Cf. A004754 (10), A004755 (11), A004756 (100), A004757 (101), A004759 (111).
Cf. A004760, A053644, A062050, A076877.
Adjacent sequences: A004755 A004756 A004757 this_sequence A004759 A004760 A004761
Sequence in context: A028588 A004749 A107687 this_sequence A055051 A143957 A105115
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
njas
|
|
EXTENSIONS
|
Edited by Ralf Stephan (ralf(AT)ark.in-berlin.de), Oct 12 2003
|
|
