A382085 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A382085

a(n) is the unique k such that A382067(n) * A382067(n+1) = k!.

2

2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 13, 12, 11, 10, 11, 12, 13, 14, 15, 13, 9, 8, 7, 4, 5, 6, 7, 8, 10, 11, 12, 10, 5, 6, 7, 8, 9, 7, 6, 7, 8, 7, 8, 9, 7, 6, 7, 9, 10, 11, 12, 10, 9, 8, 5, 6, 7, 8, 9, 8, 9, 10, 8, 7, 6, 7, 9, 10, 11, 12, 10, 9, 10

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Rémy Sigrist, Table of n, a(n) for n = 1..10000

Rémy Sigrist, PARI program

FORMULA

a(n) = A084558(A382067(n) * A382067(n+1)).

EXAMPLE

A382067(15) * A382067(15+1) = 2027025 * 3072 = 13!, so a(15) = 13.

PROG

(PARI) \\ See Links section.

CROSSREFS

Cf. A084558, A382067.

Sequence in context: A057946 A331270 A117657 * A352529 A357434 A309083

Adjacent sequences: A382082 A382083 A382084 * A382086 A382087 A382088

KEYWORD

nonn

AUTHOR

Rémy Sigrist, Mar 15 2025

STATUS

approved