A138727 Numbers n whose hexadecimal representation is the n-th member of the alphanumeric sequence: 1A, 2A, 3B, 4B, 5B, 6B, 7B, 8B, 8B, 8B, 1B, 2B, 3A, 4A, 5A, 6A, 7A, 8A. (A notation convention of the groups in the periodic table of the elements with 18 columns).

26, 42, 59, 75, 91, 107, 123, 139, 139, 139, 27, 43, 58, 74, 90, 106, 122, 138

Offset

1,1

Comments

See the periodic table of the elements with 18 columns in A138723 and A138724. See A138718 for more information.

Links

Table of n, a(n) for n=1..18.

Crossrefs

Cf. A138718, A138723, A138724.

Sequence in context: A125218 A174990 A285513 * A248404 A280645 A260207

Adjacent sequences: A138724 A138725 A138726 * A138728 A138729 A138730

Keyword

easy,fini,full,nonn

Author

Omar E. Pol, Apr 16 2008

Status

approved