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A273105 a(n) = A038572(n) + A006257(n), sum of the two numbers obtained by rotating the binary representation of n by one place to the right and to the left. 4
0, 2, 2, 6, 3, 9, 8, 14, 5, 15, 10, 20, 15, 25, 20, 30, 9, 27, 14, 32, 19, 37, 24, 42, 29, 47, 34, 52, 39, 57, 44, 62, 17, 51, 22, 56, 27, 61, 32, 66, 37, 71, 42, 76, 47, 81, 52, 86, 57, 91, 62, 96, 67, 101, 72, 106, 77, 111, 82, 116, 87, 121, 92, 126, 33, 99 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..65.

MATHEMATICA

Table[FromDigits[RotateRight@ #, 2] + FromDigits[RotateLeft@ #, 2] &@ IntegerDigits[n, 2], {n, 0, 65}] (* Michael De Vlieger, May 17 2016 *)

PROG

(Python)

print '0, ',

for n in xrange(1, 1000):

    BL = len(bin(n))-2

    x = (n>>1) + ((n&1) << (BL-1))   # A038572(n)

    x+= (n*2) - (1<<BL) + 1   # A006257(n)  for n>0

    print str(x)+', ',

CROSSREFS

Cf. A006257, A038572, A088161, A088163.

Sequence in context: A308159 A081745 A240578 * A307966 A129889 A263673

Adjacent sequences:  A273102 A273103 A273104 * A273106 A273107 A273108

KEYWORD

nonn,base,easy

AUTHOR

Alex Ratushnyak, May 15 2016

STATUS

approved

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Last modified November 19 03:36 EST 2019. Contains 329310 sequences. (Running on oeis4.)