A065541 a(n) is smallest prime > 5*a(n-1), a(1) = 5.

5, 29, 149, 751, 3761, 18839, 94201, 471007, 2355037, 11775191, 58875961, 294379823, 1471899119, 7359495683, 36797478433, 183987392167, 919936960849, 4599684804259, 22998424021409, 114992120107093, 574960600535527

Offset

1,1

Links

Table of n, a(n) for n=1..21.

Mathematica

NextPrim[n_Integer] := Block[ {k = n + 1}, While[ !PrimeQ[k], k++ ]; Return[k]]; a[1] = 5; a[n_] := NextPrim[ 5*a[n - 1]]; Table[ a[n], {n, 1, 25} ]

Crossrefs

Sequence in context: A272839 A272921 A198764 * A060926 A320089 A377294

Adjacent sequences: A065538 A065539 A065540 * A065542 A065543 A065544

Keyword

nonn

Author

Robert G. Wilson v, Nov 28 2001

Status

approved