A115558 a(n) is the square root of A115557(n).

1, 7, 11, 13, 19, 23, 29, 31, 43, 47, 53, 73, 83, 97, 103, 113, 127, 157, 179, 197, 199, 223, 227, 233, 239, 241, 251, 257, 271, 281, 311, 316, 317, 333, 353, 389, 401, 409, 419, 421, 443, 449, 461, 467, 479, 491, 503, 509, 549, 563, 587, 593, 599, 617, 641

Offset

1,2

Links

Giovanni Resta, Table of n, a(n) for n = 1..10000

Formula

The commutator [sigma, tau] is zero and a(n) is the square root of solutions. Both prime and composite numbers.

Crossrefs

Cf. A000005, A000203, A076360, A076361, A062068, A062069, A115557, A115559, A115560.

Sequence in context: A274915 A336381 A152469 * A067466 A091932 A165349

Adjacent sequences: A115555 A115556 A115557 * A115559 A115560 A115561

Keyword

nonn

Author

Labos Elemer, Jan 25 2006

Status

approved