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A211969 Triangle of decimal equivalents of binary numbers with some initial repeats, A211968. 4
3, 6, 7, 10, 12, 13, 14, 15, 20, 21, 24, 25, 26, 27, 28, 29, 30, 31, 36, 40, 41, 42, 43, 45, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 72, 73, 80, 81, 82, 83, 84, 85, 86, 87, 90, 91, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Alois P. Heinz, Rows n = 2..14, flattened

Index entries for sequences related to curling numbers

EXAMPLE

Irregular triangle begins, starting at row 2:

3;

6, 7;

10, 12, 13, 14, 15;

20, 21, 24, 25, 26, 27, 28, 29, 30, 31;

36, 40, 41, 42, 43, 45, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63;

MAPLE

s:= proc(n) s(n):= `if`(n=1, [[1]], map(x->

[[x[], 0], [x[], 1]][], s(n-1))) end:

T:= proc(n) map (x-> add(x[i]*2^(nops(x)-i), i=1..nops(x)), select

(proc(l) local i; for i to iquo(nops(l), 2) do if l[1..i]=

l[i+1..2*i] then return true fi od; false end, s(n)))[] end:

seq (T(n), n=2..7); # Alois P. Heinz, Dec 04 2012

CROSSREFS

Complement of A211967.

Row lengths give: A093370.

Column 1 gives: A005418(n+1).

Right border gives: A000225(n).

Cf. A093370, A093371, A121880, A122536, A211027, A211029, A211973, A216955.

Sequence in context: A188073 A286806 A297125 * A173059 A189387 A091087

Adjacent sequences: A211966 A211967 A211968 * A211970 A211971 A211972

KEYWORD

nonn,tabf

AUTHOR

Omar E. Pol, Dec 03 2012

STATUS

approved

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Last modified February 2 02:30 EST 2023. Contains 359997 sequences. (Running on oeis4.)