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A323829
Position where n first appears in A306211, or -1 if n never appears.
1
1, 3, 37, 60, 255
OFFSET
1,2
COMMENTS
If 6 does appear in A306211, this happens after term 10228800161220 (see comments in A306211).
CROSSREFS
Cf. A306211.
Sequence in context: A338751 A300347 A047691 * A139842 A091824 A056408
KEYWORD
nonn,more,hard
AUTHOR
N. J. A. Sloane, Feb 01 2019
STATUS
approved