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Conjecture 1: Sequence A104320 never obtains the values in this sequence, so A104321(a(n)) is undefined. Conjecture 2: This sequence is infinite. - David W. Wilson, Oct 21 2016, edited by Antti Karttunen, Oct 29 2016
Table of n, a(n) for n=1..44.
Cf. A036463, A104320, A104321.
Sequence in context: A056035 A105993 A036269 * A020443 A129544 A095621
Adjacent sequences: A036459 A036460 A036461 * A036463 A036464 A036465
David W. Wilson