The On-Line Encyclopedia of Integer Sequences (OEIS)

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A272766 revision #4

A272766

Numbers n such that A265163(n) = n-1.

2, 3, 4, 6, 7, 10, 15, 19, 22, 30, 31, 34, 36, 51, 52, 54, 70, 75, 90, 91, 96, 99, 100, 106, 114, 115, 120, 135, 136, 156, 174, 190, 199, 210, 231, 244, 271, 286, 300, 316, 330, 346, 351, 370, 376, 394, 411, 414, 415, 430, 439, 496, 510, 516, 520, 531, 546, 559, 576, 615

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OFFSET

1,1

COMMENTS

Conjecture: primorial numbers are the membres of a(n).

LINKS

Table of n, a(n) for n=1..60.

CROSSREFS

Cf. A002110, A265163.

Sequence in context: A355393 A163771 A194855 * A271340 A362851 A117851

Adjacent sequences: A272763 A272764 A272765 * A272767 A272768 A272769

KEYWORD

nonn,easy

AUTHOR

Juri-Stepan Gerasimov, May 06 2016

STATUS

proposed