A076022 Position of 2n in A073662.

1, 4, 2, 9, 3, 8, 10, 7, 5, 11, 6, 15, 12, 14, 20, 16, 19, 13, 17, 21, 18, 26, 23, 25, 31, 22, 27, 32, 40, 30, 35, 28, 24, 34, 29, 39, 37, 41, 44, 33, 45, 36, 50, 42, 38, 65, 43, 46, 51, 47, 57, 52, 48, 54, 63, 55, 62, 58, 56, 49, 53, 60, 66, 64, 67, 59, 74, 68, 73, 71, 61, 70

Offset

1,2

Comments

It is not clear that each even number will appear in A073662, though I've checked it up to 20000.

Links

Table of n, a(n) for n=1..72.

Formula

a(n) = position of (2n) in A073662: A073662(a(n)) = 2n.

Example

a(1)=4 because 2*1=2 appears at 4th position in A073662, a(14)=14 because 2*14=28 appears at 14th position in A073662,

Crossrefs

Cf. A073662, A073664, A076023.

Sequence in context: A095303 A060734 A075594 * A064421 A051494 A262025

Adjacent sequences: A076019 A076020 A076021 * A076023 A076024 A076025

Keyword

easy,nonn

Author

Zak Seidov, Sep 30 2002

Status

approved