OFFSET
1,2
COMMENTS
Conjecturally: this sequence is a permutation of the natural numbers, and a(n) ~ n.
This sequence is related to A280659: here we consider the absolute difference, there the sum, of consecutive terms.
LINKS
Rémy Sigrist, Table of n, a(n) for n = 1..25000
Rémy Sigrist, PARI program for A288798
EXAMPLE
The first terms, alongside the primes p dividing |a(n) - a(n+1)|, are:
n a(n) p
-- ---- --------------
1 1 2, 3, 5, 7, 11
2 2311 2, 3, 5, 7, 11
3 4621 2, 3, 5, 11, 13
4 331 2, 3, 5, 7, 11
5 2641 2, 3, 5, 7, 11
6 4951 2, 3, 5, 7, 23
7 121 2, 3, 5, 7, 11
8 2431 2, 3, 5, 7, 11
9 4741 2, 3, 5, 11, 13
10 451 2, 3, 5, 7, 11
11 2761 2, 3, 5, 7, 13
12 31 2, 3, 5, 7, 11
13 2341 2, 3, 5, 7, 11
14 4651 2, 3, 5, 11, 13
15 361 2, 3, 5, 7, 11
16 2671 2, 3, 5, 7, 11
17 4981 2, 3, 5, 7, 23
18 151 2, 3, 5, 7, 11
19 2461 2, 3, 5, 7, 11
20 4771 2, 3, 5, 11, 13
CROSSREFS
KEYWORD
nonn
AUTHOR
Rémy Sigrist, Jun 16 2017
STATUS
approved