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A330340 a(n) is the least k such that A092213(n) = k + reverse(k) (where reverse(k) is the binary reverse of k, A030101(k)). 2
0, 1, 2, 4, 3, 6, 5, 7, 10, 16, 9, 14, 11, 20, 18, 15, 32, 17, 22, 26, 21, 19, 30, 34, 23, 27, 44, 31, 38, 64, 33, 50, 46, 37, 54, 35, 68, 45, 62, 39, 66, 76, 51, 84, 47, 55, 74, 70, 92, 63, 128, 65, 98, 78, 86, 73, 106, 69, 102, 94, 67, 132, 77, 110, 85, 118 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Rémy Sigrist, Table of n, a(n) for n = 0..7528

Rémy Sigrist, PARI program for A330340

FORMULA

a(n) + A030101(a(n)) = A092213(n).

a(n) <= A331585(n).

EXAMPLE

For n = 3:

- A092213(3) = 5,

- 4 is the least k such that k + reverse(k) = 5,

- so a(3) = 4.

PROG

(PARI) See Links section.

CROSSREFS

Cf. A030101, A055944, A092213, A331585.

Sequence in context: A278511 A255552 A255551 * A328696 A053629 A227370

Adjacent sequences:  A330337 A330338 A330339 * A330341 A330342 A330343

KEYWORD

nonn,base

AUTHOR

Rémy Sigrist, Jan 21 2020

STATUS

approved

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Last modified June 5 01:27 EDT 2020. Contains 334828 sequences. (Running on oeis4.)