A361249 Run length transform of A362415.

1, 1, 2, 2, 3, 1, 4, 3, 5, 4, 6, 5, 7, 6, 3, 4, 8, 7, 9, 8, 10, 9, 8, 10, 11, 10, 12, 11, 13, 12, 14, 13, 11, 14, 15, 14, 15, 15, 16, 16, 17, 17, 18, 18, 19, 19, 19, 19, 20, 20, 21, 21, 22, 20, 20, 22, 23, 23, 24, 24, 25, 25, 26, 26, 27, 22, 23, 27, 28, 27, 28, 28, 29, 29, 30, 30, 31, 31

Offset

1,3

Comments

This sequence is the length of the runs of 1s and 2s in A362415.

Every number k appears as a(n) = k for some odd n, and if A362415(n) = 2 then also a second time at another odd n (with it too A362415(n) = 2). Likewise, similarly, for even n and so altogether every k at least 2 times and a maximum of 4 times.

Links

Neal Gersh Tolunsky, Table of n, a(n) for n = 1..10000

Kevin Ryde, PARI/GP Code

Prog

(PARI) \\ See links.

Crossrefs

Cf. A362415, A028242.

Sequence in context: A366749 A304529 A071281 * A204995 A371907 A368400

Adjacent sequences: A361246 A361247 A361248 * A361250 A361251 A361252

Keyword

nonn

Author

Neal Gersh Tolunsky, Apr 20 2023

Status

approved