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A067396 a(n) is the position of the n-th occurrence of the pair "2,2" in A067395 (the first difference sequence of A067368). 3
4, 13, 22, 31, 36, 41, 50, 59, 68, 77, 86, 95, 104, 109, 114, 123, 132, 141, 150, 159, 168, 177, 182, 187, 196, 205, 214, 223, 232, 241, 250, 255, 260, 269, 278, 287, 292, 297, 306, 315, 324, 329, 334, 343, 352, 361, 370, 379, 388, 397, 402, 407, 416, 425 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A comparison of this sequence with A067368 suggests the following conjecture: a(n)=2*A067368(n)+n-1. This has been confirmed for several hundred terms.

Above conjecture is true, and it is same as conjecture in Formula section of A067368. - Altug Alkan, Sep 26 2018

LINKS

Altug Alkan, Table of n, a(n) for n = 1..1000

EXAMPLE

A067395 begins {4,4,4,2,2,4,4,4,4,...}, so a(1)=4.

CROSSREFS

Cf. A067368, A067395, A213258.

Sequence in context: A153193 A304905 A043469 * A017209 A052218 A183148

Adjacent sequences:  A067393 A067394 A067395 * A067397 A067398 A067399

KEYWORD

nonn

AUTHOR

John W. Layman, Jan 22 2002

STATUS

approved

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Last modified July 9 14:41 EDT 2020. Contains 335543 sequences. (Running on oeis4.)