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A076146 a(1)=1; a(n)=a(n-1)*prime(a(n-1)). 7
1, 2, 6, 78, 30966, 11234495766, 3197149582479668022558 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Previous term * prime(previous term). Previous term + prime(previous term) is A074271.

Matula-Goebel numbers of the finite ordinal numbers; see also A007097. - Gus Wiseman, Aug 30 2016

LINKS

Table of n, a(n) for n=1..7.

MATHEMATICA

NestList[# Prime@ # &, 1, 6] (* Michael De Vlieger, Aug 30 2016 *)

CROSSREFS

Cf. A074271, A007097, A000040, A004111.

Sequence in context: A231508 A136306 A274825 * A114552 A302343 A244084

Adjacent sequences:  A076143 A076144 A076145 * A076147 A076148 A076149

KEYWORD

nonn

AUTHOR

Zak Seidov, Nov 02 2002

EXTENSIONS

a(7) from Gus Wiseman, Aug 30 2016

STATUS

approved

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Last modified August 10 08:28 EDT 2020. Contains 336368 sequences. (Running on oeis4.)