A393388 Least prime factor of A254859.

3, 2, 7, 11, 2, 13, 17, 7, 2, 13, 73, 17, 97, 101, 103, 109, 139, 149, 151, 157, 167, 2, 29, 181, 191, 193, 11, 211, 271, 277, 281, 41, 283, 293, 307, 313, 317, 331, 337, 367, 373, 379, 47, 389, 397, 409, 433, 439, 449, 457, 461, 463, 467, 479, 487, 499, 509, 563, 593, 599, 601

Offset

1,1

Links

Michel Marcus, Table of n, a(n) for n = 1..4381

Formula

a(n) = A020639(A254859(n)).

Crossrefs

Cf. A020639, A254859, A393415.

Sequence in context: A193859 A174330 A099329 * A182871 A143329 A365227

Adjacent sequences: A393385 A393386 A393387 * A393389 A393390 A393391

Keyword

nonn

Author

Michel Marcus, Feb 13 2026

Status

approved