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

Author

Antti Karttunen, Apr 17 2022

Keywords

• nonn

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

• 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.