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A020638 Least inverse of A001390, or 0 if no inverse exists. 0
2, 7, 11, 5, 89, 73, 31, 0, 43, 601, 3343, 109, 2383, 997, 1021, 0, 577, 2441, 3673, 11149, 5737, 3373, 6793, 721051, 1093, 37507, 0, 52189, 15361, 58237, 10513, 0, 49369, 24373, 2593, 103813, 5233, 73141, 11551, 970201, 17881, 573871, 113329, 729301 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..44.

CROSSREFS

Sequence in context: A133154 A100020 A241807 * A091385 A053247 A226089

Adjacent sequences:  A020635 A020636 A020637 * A020639 A020640 A020641

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified July 29 17:41 EDT 2021. Contains 346346 sequences. (Running on oeis4.)