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A248545
a(n+1) = a(n)^2 + 75.
0
0, 75, 5700, 32490075, 1055604973505700, 1114301860089969598947932490075, 1241668635399966182910364962424859894024949485439789973505700
OFFSET
0,2
COMMENTS
Dedicated to N. J. A. Sloane for his 75th birthday!
LINKS
A. V. Aho and N. J. A. Sloane, Some doubly exponential sequences, The Fibonacci Quarterly, 11 (1973), 429-437.
FORMULA
a(n) ~ c^(2^n), where c = 8.688980833378203252201919626948141475048572223268...
MATHEMATICA
RecurrenceTable[{a[n+1]==a[n]^2+75, a[0]==0}, a, {n, 0, 10}]
NestList[#^2+75&, 0, 10] (* Harvey P. Dale, Jan 14 2016 *)
CROSSREFS
Cf. A003095.
Sequence in context: A207552 A207313 A206696 * A114910 A294983 A361282
KEYWORD
nonn
AUTHOR
Vaclav Kotesovec, Oct 08 2014
STATUS
approved