A331587 -id:A331587 - cp's OEIS frontend

A331588 a(n) is the least k such that A331587(n) = k * reverse(k) (where reverse(k) is the binary reversal of k, A030101(k)).

1, 3, 5, 7, 9, 11, 15, 17, 21, 19, 23, 27, 31, 33, 37, 35, 45, 39, 43, 51, 47, 55, 63, 65, 73, 69, 67, 77, 85, 75, 71, 83, 93, 79, 99, 91, 87, 107, 103, 95, 111, 119, 127, 129, 137, 133, 153, 141, 149, 131, 165, 157, 139, 147, 135, 173, 163, 155, 143, 151, 189

Offset: 1

Rémy Sigrist, Jan 21 2020

Rémy Sigrist, Table of n, a(n) for n = 1..8347
Rémy Sigrist, PARI program for A331588

Cf. A030101, A331587, A331589.

PARI
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See Links section.
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a(n) = A030101(A331589(n)).

a(n) * A331589(n) = A331587(n).

A331589 a(n) is the greatest k such that A331587(n) = k * reverse(k) (where reverse(k) is the binary reversal of k, A030101(k)).

Original entry on oeis.org

1, 3, 5, 7, 9, 13, 15, 17, 21, 25, 29, 27, 31, 33, 41, 49, 45, 57, 53, 51, 61, 59, 63, 65, 73, 81, 97, 89, 85, 105, 113, 101, 93, 121, 99, 109, 117, 107, 115, 125, 123, 119, 127, 129, 145, 161, 153, 177, 169, 193, 165, 185, 209, 201, 225, 181, 197, 217, 241

Offset: 1

Rémy Sigrist, Jan 21 2020

Rémy Sigrist, Table of n, a(n) for n = 1..8347
Rémy Sigrist, PARI program for A331589

Cf. A030101, A331587, A331588.

PARI
```
See Links section.
```

a(n) = A030101(A331588(n)).

a(n) * A331588(n) = A331587(n).

cp's OEIS Frontend

A331588 a(n) is the least k such that A331587(n) = k * reverse(k) (where reverse(k) is the binary reversal of k, A030101(k)).

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