A126441 -id:A126441 - cp's OEIS frontend

A173870 Consider each term k contained in A114994; write 2k if and only if 2k is not a member of A114994.

6, 14, 20, 22, 30, 38, 46, 62, 70, 72, 78, 84, 86, 94, 126, 134, 142, 148, 150, 158, 174, 190, 254, 262, 270, 272, 276, 278, 286, 294, 302, 318, 340, 342, 350, 382, 510, 518, 526, 532, 534, 542, 550, 558, 574, 584, 590, 596, 598, 606, 638, 686, 702, 766, 1022

Offset: 0

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Alford Arnold, Mar 01 2010

nonn
tabf

Recall that A114994 can be regarded as a table with row lengths A000041(n).
Likewise, a(n) has row lengths 0,1,1,3,3,7,8,14,18,28,35,53,67,... which appears to coincide with sequence A117989.
The row lengths also match 1 2 3 5 7 11 15 22 ... minus 1 1 2 2 4 4 7 8 ... - Alford Arnold, Mar 30 2010

			Row three of A114994 is 4,5,7 when doubled becomes 8,10,14.
8 and 10 are in A114994 so not in a(n); 14 is not in A114994 so is in a(n).

Cf. A000041 A114994 A117989 (A125106, A126441, A161924)(3 closely related sequences).

Cf. A002865 [From Alford Arnold, Mar 30 2010]

cp's OEIS Frontend

A173870 Consider each term k contained in A114994; write 2k if and only if 2k is not a member of A114994.

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