Fill in the blanks.

1, 1, 2, 4, 8, ?, ?, 56, 108, 208, 401

ID Number: A000078 (Formerly M1108 and N0423)
URL: http://www.research.att.com/projects/OEIS?Anum=A000078
Sequence: 0,0,0,1,1,2,4,8,15,29,56,108,208,401,773,1490,2872,5536,
10671,20569,39648,76424,147312,283953,547337,1055026,
2033628,3919944,7555935,14564533,28074040,54114452,
104308960,201061985,387559437,747044834
Name: Tetranacci numbers: a(n) = a(n-1) + a(n-2) + a(n-3) +a(n-4).
Comments: a(n)=number of compositions of n-3 with no part greater than 4.

Posted by Ady TZIDON on 2004-08-27 08:51:53