login
A374482
Indices of records in A347381, where A347381 is the distance from n to the nearest common ancestor of n and sigma(n) in the Doudna-tree (A005940).
5
1, 3, 7, 17, 23, 29, 31, 47, 53, 71, 83, 89, 97, 107, 127, 139, 149, 167, 179, 191, 199, 233, 239, 241, 269, 293, 337, 349, 359, 373, 383, 419, 431, 449, 461, 479, 499, 569, 571, 577, 587, 599, 643, 647, 701, 719, 769, 809, 839, 857, 863, 881, 967, 971, 1013, 1039, 1049, 1091, 1151, 1187, 1217, 1223, 1231, 1249, 1279
OFFSET
1,2
COMMENTS
Most likely, all terms are primes after the initial 1. Mersenne primes (A000668) are a subsequence.
CROSSREFS
Cf. A000668 (subsequence), A005940, A347381, A374483 (record values).
Cf. also A374481.
Sequence in context: A254680 A018411 A083989 * A277213 A152451 A097958
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jul 09 2024
STATUS
approved