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A294899
a(n) = A000203(n) XOR A005187(n), where XOR is bitwise-XOR, A003987.
8
0, 0, 0, 0, 14, 6, 3, 0, 29, 0, 31, 10, 25, 1, 2, 0, 50, 5, 55, 12, 7, 13, 50, 18, 48, 27, 26, 13, 40, 112, 25, 0, 112, 116, 115, 29, 97, 117, 114, 20, 101, 49, 126, 1, 24, 16, 105, 34, 102, 60, 42, 7, 80, 16, 33, 21, 62, 42, 77, 220, 75, 23, 16, 0, 212, 18, 199, 248, 231, 25, 194, 77, 197, 227, 238, 25, 246, 48, 201, 36
OFFSET
1,5
FORMULA
a(n) = A000203(n) XOR A005187(n).
MATHEMATICA
Array[BitXor[DivisorSigma[1, #], IntegerExponent[(2 #)!, 2]] &, 80] (* Michael De Vlieger, Nov 26 2017 *)
PROG
(Scheme) (define (A294899 n) (A003987bi (A000203 n) (A005187 n))) ;; Where A003987bi implements the bitwise-XOR, A003987.
CROSSREFS
Cf. A000203, A003987, A005187, A294898, A295296 (positions of zeros), A295297 (parity of a(n)).
Cf. also A169813, A279357, A283997.
Sequence in context: A166208 A367327 A239863 * A118780 A220672 A353120
KEYWORD
nonn
AUTHOR
Antti Karttunen, Nov 25 2017
STATUS
approved