A324880 Even numbers k such that A324863(k) = A324874(k).

16, 64, 90, 256, 484, 490, 750, 756, 810, 988, 1000, 1024, 1296, 1440, 2116, 2622, 2662, 3630, 3710, 4004, 4116, 4624, 4896, 4900, 5880, 6426, 6724, 6760, 7290, 7744, 7840, 7920, 8100, 8924, 9604, 10000

Offset: 1

Author

Antti Karttunen, Mar 27 2019

Keywords

• nonn

Comments

Of 36 such numbers found in the range 1..10000, the following ten: 90, 490, 750, 810, 2622, 2662, 3630, 3710, 6426, 7290, are such that a positive integer of the form 4m+1 is produced when A156552 is applied to them: 45, 105, 117, 189, 225, 405, 765, 2205, 2565, 262185 (when sorted into ascending order). See also A324647.

Links

• Index entries for sequences related to binary expansion of n
• Index entries for sequences computed from indices in prime factorization
• Index entries for sequences related to sigma(n)

Crossrefs

Cf. A156552, A323243, A324398, A324647, A324863, A324866, A324874.

Subsequence of A324879.

Programs

PARI

for(n=1,10000,if(!(n%2)&&A324863(n)==A324874(n), print1(n,", ")));