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A341231 Irregular triangle read by rows giving trajectory from n to reach 1 under the map A245471. 3
1, 2, 1, 3, 4, 2, 1, 4, 2, 1, 5, 14, 7, 8, 4, 2, 1, 6, 3, 4, 2, 1, 7, 8, 4, 2, 1, 8, 4, 2, 1, 9, 26, 13, 22, 11, 28, 14, 7, 8, 4, 2, 1, 10, 5, 14, 7, 8, 4, 2, 1, 11, 28, 14, 7, 8, 4, 2, 1, 12, 6, 3, 4, 2, 1, 13, 22, 11, 28, 14, 7, 8, 4, 2, 1, 14, 7, 8, 4, 2, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A340873 gives row lengths.

A341235 gives greatest terms.

LINKS

Rémy Sigrist, Table of n, a(n) for n = 1..9098 (rows 1..500)

FORMULA

T(n, 1) = n.

T(n, A340873(n)) = 1.

EXAMPLE

Table begins:

    1;

    2, 1;

    3, 4, 2, 1;

    4, 2, 1;

    5, 14, 7, 8, 4, 2, 1;

    6, 3, 4, 2, 1;

    7, 8, 4, 2, 1;

    8, 4, 2, 1;

    9, 26, 13, 22, 11, 28, 14, 7, 8, 4, 2, 1;

    10, 5, 14, 7, 8, 4, 2, 1;

    11, 28, 14, 7, 8, 4, 2, 1;

    12, 6, 3, 4, 2, 1;

    13, 22, 11, 28, 14, 7, 8, 4, 2, 1;

    14, 7, 8, 4, 2, 1;

    15, 16, 8, 4, 2, 1;

    16, 8, 4, 2, 1;

    ...

PROG

(PARI) row(n) = { my (r=[n]); while (n>1, r=concat(r, n=if (n%2, bitxor(n, 2*n+1), n/2))); r }

CROSSREFS

Cf. A070165, A245471, A340873, A341235.

Sequence in context: A286539 A004741 A133923 * A334081 A125158 A273823

Adjacent sequences:  A341228 A341229 A341230 * A341232 A341233 A341234

KEYWORD

nonn,base,look,tabf

AUTHOR

Rémy Sigrist, Feb 07 2021

STATUS

approved

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Last modified April 12 18:58 EDT 2021. Contains 342932 sequences. (Running on oeis4.)