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If k is a term, then also 2*k is present in this sequence, and vice versa.

allocatedNumbers k such that k is a formultiple Anttiof KarttunenA005941(k).

1, 2, 3, 4, 5, 6, 8, 10, 12, 16, 20, 24, 32, 40, 48, 64, 80, 96, 128, 160, 192, 256, 320, 384, 512, 640, 768, 1024, 1280, 1536, 2048, 2560, 3072, 3125, 4096, 5120, 6144, 6250, 7875, 8192, 10240, 12005, 12288, 12500, 13365, 15750, 16384, 20480, 22869, 23595, 24010, 24576, 25000, 26730, 31500, 32768, 40960, 45738, 46475

1,2

Numbers k such that k is a multiple of 1+A156552(k).

(PARI) A005941(n) = { my(f=factor(n), p, p2=1, res=0); for(i=1, #f~, p = 1 << (primepi(f[i, 1])-1); res += (p * p2 * (2^(f[i, 2])-1)); p2 <<= f[i, 2]); (1+res) }; \\ (After David A. Corneth's program for A156552) - Antti Karttunen, Jul 28 2023

isA364550(n) = !(n%A005941(n));

Cf. A005941, A156552, A364548.

Subsequence of A364560.

Subsequences: A029747, A364551 (odd terms).

Cf. also

allocated

nonn

Antti Karttunen, Jul 28 2023

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allocated for Antti Karttunen

allocated

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