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A350620 a(n) = smallest k such that A350877(k) = n, or -1 if n does not appear in A350877. 7
1, 7, 2, 6, 71, 3, 25, 5, 22, 70, 30, 13, 345, 24, 27, 16, 161, 21, 148, 69, 32, 29, 51, 43, 1154, 344, 161336, 23, 34, 26, 48, 737, 156, 160, 36, 77534485877, 63, 147, 38, 68, 234, 31, 40, 28, 53, 50, 126, 42, 639, 1153, 58, 343, 73, 161335, 88, 111, 108, 33, 135, 614667, 192, 47, 65, 736, 60, 155, 454, 159, 186, 35, 97, 77534485876, 78, 62, 2340, 146, 143, 37, 24841, 67, 476, 233, 433, 10579, 140, 39, 359, 169, 85, 52, 80, 49, 195, 125, 166, 41, 17282073747557 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
CROSSREFS
Cf. A350877. See A350621 for where the primes appear.
Sequence in context: A073330 A208852 A248284 * A195404 A225146 A021583
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jan 23 2022.
EXTENSIONS
a(27) was found by Keith F. Lynch, and a(36) and a(72) by Russ Cox.
a(97) and a(115) were found by Martin Ehrenstein using Kim Walisch's primesieve package.
More than the usual number of terms are shown in order to give all the terms up to the extreme value a(97).
STATUS
approved

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)