A279195 Numbers of the form {(11*h+p)*11^(2k+1)-1 | h,k in N and p in {1,3,4,5,9} } U {(11*h+q)*11^2k-1 | h,k in N and q in {2,6,7,8,10} }.
1, 5, 6, 7, 9, 10, 12, 16, 17, 18, 20, 23, 27, 28, 29, 31, 32, 34, 38, 39, 40, 42, 43, 45, 49, 50, 51, 53, 54, 56, 60, 61, 62, 64, 67, 71, 72, 73, 75, 78, 82, 83, 84, 86, 89, 93, 94, 95, 97, 98, 100, 104, 105, 106, 108, 111, 115, 116, 117, 119, 122, 126, 127, 128, 130, 131
Offset: 1
Keywords
Links
- Ray Chandler, Table of n, a(n) for n = 1..10000
- Hao Fu, G.-N. Han, Computer assisted proof for Apwenian sequences related to Hankel determinants, arXiv preprint arXiv:1601.04370 [math.NT], 2016. See sequence "K" in Section 2.3.
- Guo-Niu Han, The program Apwen.py
Programs
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Mathematica
isok[n_]:=Module[{ord=IntegerExponent[n+1,11],pq={{2,6,7,8,10},{1,3,4,5,9}}},MemberQ[pq[[Mod[ord,2]+1]],Mod[(n+1)/11^ord,11]]];Select[Range[0,131],isok] (* Ray Chandler, Dec 17 2016 *)
Extensions
Definition (from p. 5, Definition 2.1 of the arXiv reference) provided by Arie Groeneveld, Dec 16 2016
More terms from Ray Chandler, Dec 17 2016
Comments