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A288605 Position of first appearance of each integer in A088568 (number of 1's minus number of 2's in first n terms of A000002). 11
0, 1, 3, 12, 32, 93, 257, 378, 471, 798, 825, 858, 1127, 1398, 1497, 1524, 1533, 6352, 6969, 7176, 7269, 7566, 7971, 20338, 20371, 21982, 22009, 25638, 25665, 25692, 27969, 39184, 39211, 42398, 43129, 43150, 48637, 48730, 48757, 49014, 49041, 49068, 49095, 49864 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

For the definition of this sequence we assume A088568(0) = 0.

LINKS

Table of n, a(n) for n=1..44.

EXAMPLE

A088568(12) = -2 is the first appearance of -2 in A088568, so 12 belongs to the sequence.

A088568(32) = 2 is the first appearance of 2, so 32 belongs to the sequence.

MATHEMATICA

Map[First, Values@ #] - 1 &@ PositionIndex@ Prepend[#, 0] &@ MapIndexed[3 First@ #2 - 2 #1 &, Accumulate@ Prepend[Nest[Flatten[Partition[#, 2] /. {{2, 2} -> {2, 2, 1, 1}, {2, 1} -> {2, 2, 1}, {1, 2} -> {2, 1, 1}, {1, 1} -> {2, 1}}] &, {2, 2}, 25], 1]] (* Michael De Vlieger, Jun 12 2017, after Birkas Gyorgy at A000002 *)

CROSSREFS

Cf. A000002, A010120, A088568, A187831.

Sequence in context: A098500 A037236 A309693 * A268768 A174963 A054602

Adjacent sequences:  A288602 A288603 A288604 * A288606 A288607 A288608

KEYWORD

nonn

AUTHOR

Gus Wiseman, Jun 11 2017

STATUS

approved

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Last modified January 18 11:57 EST 2022. Contains 350455 sequences. (Running on oeis4.)