A240535 - OEIS

A240535

a(n)=m if n belongs to the S_m sequence described in A240521.

1, 1, 1, 1, 3, 1, 5, 1, 9, 1, 3, 1, 17, 5, 1, 1, 33, 1, 3, 9, 65, 1, 7, 1, 129, 17, 5, 1, 13, 1, 257, 33, 513, 3, 9, 1, 1025, 65, 11, 1, 25, 1, 17, 5, 2049, 1, 129, 1, 4097, 257, 33, 1, 49, 9, 21, 513, 8193, 1, 7, 1, 16385, 3, 65, 17, 97, 1, 129, 1025, 19, 1

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OFFSET

2,5

COMMENTS

See comments in A240521.

LINKS

Table of n, a(n) for n=2..71.

EXAMPLE

Let n = 30. We have a unique representation of 30 as a product of distinct terms of A050376: 30 = 2*3*5. We write all the terms of A050376 in the interval [2,5]: 2,3,4,5. Under the terms used in the representation of 30 we write 1, under other terms we write 0. After concatenation we obtain the binary number corresponding to 30: 1101. In decimal it is 13. So a(30) = 13.

Let n = 60 = 3*4*5. In the interval [3,5] the terms of A050376 are 3,4,5, all of which are used in the representation of 60. So we write 1 under all 3 terms and obtain the binary number 111. In decimal it is 7. So a(60)=7.

CROSSREFS

Positions of particular values: A050376 (1), A240521 (3), A240522 (5), A240524 (7), A240536 (9), A241024 (11), A241025 (13).

Sequence in context: A254577 A051707 A302787 * A262397 A155912 A050354

Adjacent sequences: A240532 A240533 A240534 * A240536 A240537 A240538

KEYWORD

nonn

AUTHOR

Vladimir Shevelev, Apr 07 2014

EXTENSIONS

Terms corrected and more terms added, Peter J. C. Moses, Apr 18 2014

Name revised and other edits by Peter Munn, Oct 11 2021

STATUS

approved