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A362254

Reciprocal of n modulo largest prime smaller than n.

1, 1, 2, 1, 3, 1, 4, 5, 2, 1, 6, 1, 7, 9, 10, 1, 9, 1, 10, 13, 5, 1, 12, 8, 6, 14, 4, 1, 15, 1, 16, 21, 8, 25, 26, 1, 19, 25, 28, 1, 21, 1, 22, 29, 11, 1, 24, 16, 12, 19, 8, 1, 27, 18, 40, 32, 9, 1, 30, 1, 31, 41, 46, 49, 51, 1, 34, 45, 17, 1, 36, 1, 37, 49 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`3,3`
	LINKS	`Alois P. Heinz, Table of n, a(n) for n = 3..10000`
	FORMULA	`a(n) = 1 <=> n in { A008864 }.`
	MAPLE	`a:= n-> n&^(-1) mod prevprime(n):` `seq(a(n), n=3..100);`
	PROG	`(Python)` `from sympy import prevprime` `def A362254(n): return pow(n, -1, prevprime(n)) # Chai Wah Wu, Apr 13 2023`
	CROSSREFS	`Cf. A008864, A122585, A151799.` `Sequence in context: A219356 A142878 A299774 * A341866 A300242 A293892` `Adjacent sequences: A362251 A362252 A362253 * A362255 A362256 A362257`
	KEYWORD	`nonn,look`
	AUTHOR	`Alois P. Heinz, Apr 13 2023`
	STATUS	`approved`

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Last modified September 11 13:40 EDT 2024. Contains 375836 sequences. (Running on oeis4.)