A374909 Odd numbers k which can be written as k = r+s where r and s are elements of the Collatz trajectory of k.

3, 5, 7, 9, 11, 13, 15, 17, 19, 25, 27, 29, 31, 33, 37, 39, 41, 43, 45, 47, 51, 55, 57, 59, 61, 63, 65, 67, 71, 73, 81, 87, 89, 93, 95, 97, 101, 103, 105, 107, 109, 111, 115, 123, 125, 127, 129, 135, 139, 143, 145, 147

Offset

1,1

Comments

These are the odd entries of A374847.

There seems to be a large gap after a(4882) = 1247366013. It might be hard to find a(4883).

Links

Markus Sigg, Table of n, a(n) for n = 1..4882

Crossrefs

Intersection of A005408 and A374847.

Sequence in context: A074775 A356845 A225105 * A143451 A352547 A014261

Adjacent sequences: A374906 A374907 A374908 * A374910 A374911 A374912

Keyword

nonn,look

Author

Markus Sigg, Jul 23 2024

Status

approved