A144718 a(n) = n-th prime arising A144717.

3, 5, 13, 61, 421, 3361, 30241, 332641, 3991681, 55883521, 950019841, 19000396801, 456009523201, 13680285696001, 465129713664001, 20465707401216001, 1473530932887552001, 125250129295441920001, 10771511119408005120001

Offset

1,1

Links

Jon E. Schoenfield, Table of n, a(n) for n = 1..282

Formula

a(n) = 2*Product_{k=1..n} A144717(k) + 1.

Mathematica

k = 2; a = {}; Do[If[PrimeQ[k n + 1], AppendTo[a, k n+1 ]; k = k n ], {n, 1, 3000}]; a

Crossrefs

Cf. A046966, A046972, A144717, A144718, A144722, A144723, A144724, A144725, A144726, A144727, A144728, A144729, A144730, A144731.

Sequence in context: A181848 A243161 A153207 * A347866 A066141 A159293

Adjacent sequences: A144715 A144716 A144717 * A144719 A144720 A144721

Keyword

nonn

Author

Artur Jasinski, Sep 19 2008

Status

approved