OFFSET
1,7
COMMENTS
LINKS
Seiichi Manyama, Table of n, a(n) for n = 1..17
EXAMPLE
1^2 + 6^2 + 41^2 + 1721^2 + 2963561^2 + 8782696764281^2 = 77135762453320729974211241.
MATHEMATICA
RecurrenceTable[{a[1] == a[2] == a[3] == a[4] == a[5] == a[6] == 1, a[n] == a[n-1]^2 + a[n-2]^2 + a[n-3]^2 + a[n-4]^2 + a[n-5]^2 + a[n-6]^2}, a, {n, 17}] (* Vincenzo Librandi, Aug 21 2016 *)
nxt[{a_, b_, c_, d_, e_, f_}]:={b, c, d, e, f, a^2+b^2+c^2+d^2+e^2+f^2}; NestList[ nxt, {1, 1, 1, 1, 1, 1}, 12][[All, 1]] (* Harvey P. Dale, Apr 12 2020 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Jonathan Vos Post, Jan 02 2006
STATUS
approved