A300748 Least prime divisor of A300629(n).

3, 5, 7, 13, 17, 41, 43, 53, 101, 109, 113, 151, 211, 281, 307, 331, 337, 461, 617, 727, 739, 827, 1033, 1301, 1481, 1531, 1723, 1901, 2161, 2351, 2381, 2633, 2647, 2801, 3371, 3931, 4933, 5653, 5743, 6791, 6917, 7561, 8059, 9521, 10369, 11503, 11551, 12161, 17579, 17839, 18433, 20593, 21061, 23581, 26731, 30241

Offset

1,1

Comments

For m > 2, A135720(m) = A083876(m-1) if and only if a(n) = prime(m).

Links

Max Alekseyev, Table of n, a(n) for n = 1..138

Formula

a(n) = A020639(A300629(n)).

Crossrefs

Cf. A002997, A020639, A083876, A285549, A300629.

Sequence in context: A194829 A378189 A226794 * A173641 A153645 A106878

Adjacent sequences: A300745 A300746 A300747 * A300749 A300750 A300751

Keyword

nonn

Author

Max Alekseyev, Mar 11 2018

Status

approved