login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A308507
a(n) = (a(n-1) + a(n-2))^4, for n >= 2; a(0)=0, a(1)=1.
1
0, 1, 1, 16, 83521, 48698490414981476161, 5624216052381164150697569400035392464306474190030694298257503425709420810383376
OFFSET
0,4
EXAMPLE
a(4) = (a(3) + a(2))^4 = (16 + 1)^4 = 83521.
MATHEMATICA
RecurrenceTable[{a[0]==0, a[1]==1, a[n]==(a[n-1]+a[n-2])^4}, a, {n, 10}]
PROG
(Python)
f0 = 0
f1 = 1
next_val = (f0+f1)**4
i = 0
while i <= 10:
next_val = (f0+f1)**4
f0 = f1
f1 = next_val
i = i+1
print(next_val)
CROSSREFS
KEYWORD
nonn,less
AUTHOR
John H. Chakkour, Jun 02 2019
STATUS
approved