A353363 Numbers k such that A046523(A332223(A332223(k))) is equal to A046523(A332223(k)).

1, 2, 6, 25, 38, 155, 235, 294, 322, 365, 390, 465, 528, 638, 646, 744, 765, 768, 867, 884, 924, 946, 1152, 1172, 1290, 1421, 1600, 1653, 1675, 1677, 1729, 1785, 1980, 1989, 2002, 2028

Offset

1,2

Comments

Numbers k such that A332223(k) is in A353308.

If there existed any 3-perfect number (A005820) of the form x = 4u+2 and not divisible by 3, then x would be also included in A353365 and A005940(1+x) would be included in this sequence. See comments in A353365.

Links

Table of n, a(n) for n=1..36.

Index entries for sequences computed from indices in prime factorization

Index entries for sequences related to sigma(n)

Crossrefs

Cf. A000203, A005940, A046523, A066961, A156552, A332223, A353365.

Cf. also A353308.

Sequence in context: A086591 A173609 A294945 * A073545 A103063 A220191

Adjacent sequences: A353360 A353361 A353362 * A353364 A353365 A353366

Keyword

nonn

Author

Antti Karttunen, Apr 17 2022

Status

approved