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 A325570 Numbers n that have no divisor d > 1 such that A048720(A065621(d),n/d) = n. 6
 1, 3, 5, 7, 11, 13, 15, 17, 19, 23, 25, 27, 29, 31, 37, 39, 41, 43, 47, 51, 53, 55, 57, 59, 61, 63, 67, 69, 71, 73, 77, 79, 81, 83, 85, 87, 89, 91, 95, 97, 99, 101, 103, 107, 109, 111, 113, 115, 117, 119, 121, 123, 125, 127, 131, 137, 139, 141, 143, 145, 147, 149, 151, 157, 159, 163, 167, 169, 171, 173, 175, 177, 179, 181 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Antti Karttunen, Table of n, a(n) for n = 1..10000 PROG (PARI) A048720(b, c) = fromdigits(Vec(Pol(binary(b))*Pol(binary(c)))%2, 2); A065621(n) = bitxor(n-1, n+n-1); isA325570(n) = fordiv(n, d, if(A048720(A065621(n/d), d)==n, return(d==n))); CROSSREFS Cf. A048720, A065621, A115872, A115873. Positions of ones in A325565 and A325566. Cf. A065091 (a subsequence), A325571 (the composite terms), A325572 (complement). Subsequence of A005408 (odd numbers). Sequence in context: A152955 A235866 A334141 * A210719 A353685 A322840 Adjacent sequences: A325567 A325568 A325569 * A325571 A325572 A325573 KEYWORD nonn AUTHOR Antti Karttunen, May 10 2019 STATUS approved

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Last modified April 23 10:29 EDT 2024. Contains 371905 sequences. (Running on oeis4.)