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A340272
First position of n in A308712, or -1 if that number is not in A308712.
1
0, 1, 3, 5, 2, 7, 4, 17, 9, 14, 6, 19, 11, 24, 16, 29, 8, 21, 13, 65, 26, 83, 18, 31, 10, 62, 23, 93, 15, 54, 28, 98, 85, 59, 20, 33, 12, 77, 64, 196, 25, 95, 82, 214, 56, 43, 30, 100, 87, 219, 61, 48, 22, 35, 92, 480, 79, 211, 53, 198, 27, 185, 97, 891, 84, 216, 58
OFFSET
0,3
LINKS
EXAMPLE
A308712(2)=4, so a(4)=2.
PROG
(PARI) See Links section.
CROSSREFS
Cf. A308712.
Sequence in context: A237058 A285297 A097465 * A120683 A210042 A338872
KEYWORD
nonn
AUTHOR
J. Lowell, Jan 02 2021
EXTENSIONS
a(0) = 0 added and escape clause adjusted by Rémy Sigrist, Jan 17 2021
STATUS
approved