A296208 - OEIS

A296208

Xor-Moebius transform of A005187.

1, 2, 5, 4, 9, 12, 10, 8, 20, 24, 18, 24, 22, 16, 23, 16, 33, 60, 34, 48, 41, 56, 43, 48, 39, 36, 34, 40, 55, 52, 56, 32, 86, 96, 65, 120, 70, 104, 88, 96, 78, 104, 83, 120, 88, 112, 88, 96, 84, 84, 71, 80, 103, 104, 115, 80, 72, 68, 112, 96, 116, 76, 75, 64, 158, 244, 130, 192, 168, 192, 139, 240, 142, 212, 175, 216

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OFFSET

1,2

COMMENTS

Unique sequence satisfying SumXOR_{d divides n} a(d) = A005187(n) for all n > 0, where SumXOR is the analog of summation under the binary XOR operation. See A295901 for a list of some of the properties of Xor-Moebius transform. A297111 gives the ordinary Möbius transform of A005187.

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..16384

Index entries for sequences related to binary expansion of n

PROG

(PARI)

A005187(n) = { my(s=n); while(n>>=1, s+=n); s; };

A296208(n) = { my(v=0); fordiv(n, d, if(issquarefree(n/d), v=bitxor(v, A005187(d)))); (v); } \\ after code in A295901.

CROSSREFS

Cf. A003987, A005187, A256739, A294899, A295901, A296203, A297110, A297111.

Sequence in context: A048678 A271586 A278508 * A324142 A339809 A360896

Adjacent sequences: A296205 A296206 A296207 * A296209 A296210 A296211

KEYWORD

nonn,base

AUTHOR

Antti Karttunen, Dec 25 2017

STATUS

approved