A129199 Absolute differences of A129198.

1, 3, 2, 8, 4, 16, 19, 43, 5, 53, 6, 102, 185, 377, 7, 391, 759, 1527, 9, 1545, 3062, 6134, 10, 6154, 12277, 24565, 11, 24587, 12, 49164, 98291, 196595, 13, 196621, 393202, 786418, 14, 786446, 1572849, 3145713, 15, 3145743, 6291440, 12582896, 12582895

Offset: 1

Author

Ferenc Adorjan (fadorjan(AT)freemail.hu or ferencadorjan(AT)gmail.com), Apr 04 2007

Keywords

• nonn

Comments

This sequence is known to be a permutation of positive integers, along with its parent sequence (A129198).

In the paper of Slater and Velez it is shown that both this sequence and its parent are permutations of positive integers.

Links

• P. J. Slater and W. Y. Velez, Permutations of the Positive Integers with Restrictions on the Sequence of Differences, Pacific J. Math., 71, 1977.
• William Y. Velez, Research problems 159-160, Discrete Math 110 (1992), pp. 301-302.

Crossrefs

This is the absolute difference of A129198, cf. A081145.