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A374909
Odd numbers k which can be written as k = r+s where r and s are elements of the Collatz trajectory of k.
2
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).
CROSSREFS
Intersection of A005408 and A374847.
Sequence in context: A074775 A356845 A225105 * A143451 A352547 A014261
KEYWORD
nonn,look
AUTHOR
Markus Sigg, Jul 23 2024
STATUS
approved