This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A046737 #21 Jul 25 2025 09:05:28 %S A046737 1,4,13,8,31,52,16,16,13,124,110,104,56,16,403,32,96,52,120,248,208, %T A046737 220,553,208,155,56,39,16,140,1612,331,64,1430,96,496,104,469,120,728, %U A046737 496,560,208,308,440,403,2212,46,416,112,620,1248,56,52,156 %N A046737 Reduced period of A000073 mod n. %C A046737 See A046738 for the period of the tribonacci numbers mod n. The ratio of the period to the reduced period is either 1 or 3. Robinson discusses the relationship between the period and the reduced period of a sequence. For the Fibonacci numbers, the analogous sequence is A001177. - _T. D. Noe_, Jan 14 2009 %H A046737 T. D. Noe, <a href="/A046737/b046737.txt">Table of n, a(n) for n=1..1000</a> %H A046737 D. W. Robinson, <a href="http://www.jstor.org/stable/2314796">A note on linear recurrent sequences modulo m</a>, Amer. Math. Monthly 73 (1966), 619-621. %e A046737 From _T. D. Noe_, Jan 14 2009: (Start) %e A046737 The tribonacci sequence (starting with 1) mod 7 has a period that repeats %e A046737 1, 1, 2, 4, 0, 6, 3, 2, 4, 2, 1, 0, 3, 4, 0, 0, %e A046737 4, 4, 1, 2, 0, 3, 5, 1, 2, 1, 4, 0, 5, 2, 0, 0, %e A046737 2, 2, 4, 1, 0, 5, 6, 4, 1, 4, 2, 0, 6, 1, 0, 0. %e A046737 The first pair of zeros occurs at the 16th term. Hence a(7)=16. %e A046737 (End) %Y A046737 Cf. A000073, A001177, A046738, A154753 (restriction to prime indices), A386236. %K A046737 nonn %O A046737 1,2 %A A046737 _David W. Wilson_ %E A046737 Improved name from _T. D. Noe_, Jan 14 2009