0,1

Suggested by Antti Karttunen.

Writing (prime(i))^j as i:j, we have the following table:

Primal Functions and Functional Digraphs for a(0) to a(5)

` ` ` 2 = 1:1 ` ` ` ` ` ` || 1 -> 1 (infinite loop)

` ` ` 1 = { } ` ` ` ` ` ` || 1

` ` ` 3 = 2:1 ` ` ` ` ` ` || 2 -> 1

` ` `20 = 1:2 3:1 ` ` ` ` || 3 -> 1 -> 2

` ` 756 = 1:2 2:3 4:1 ` ` || 4 -> 1 -> 2 -> 3

`178200 = 1:3 2:4 3:2 5:1 || 5 -> 1 -> 3 -> 2 -> 4

Cf. A106177, A108352, A108370, A108371, A108372, A108373, A108374, A111801.

Sequence in context: A132950 A106169 A014015 this_sequence A059333 A106485 A126008

Adjacent sequences: A108350 A108351 A108352 this_sequence A108354 A108355 A108356

nonn

Jon Awbrey (jawbrey(AT)att.net), Jun 17 2005, extended Aug 20 2005