Tetranacci numbers: a(n) = a(n-1) + a(n-2) + a(n-3) +a(n-4).
0, 0, 1, 0, 1, 2, 4, 7, 14, 27, 52, 100, 193, 372, 717, 1382, 2664, 5135, 9898, 19079
1 seqfan posts
Thu Sep 16 19:44:47 CEST 2010 [seqfan] Initial Substrings of n-bit Binary Numbers Not Divisible by k