OFFSET
1,1
REFERENCES
Alexander Abatzoglou, Alice Silverberg, Andrew V. Sutherland, and Angela Wong, Deterministic elliptic curve primality proving for a special sequence of numbers, Tenth Algorithmic Number Theory Symposium (ANTS X, 2012), pp. 1-20.
LINKS
Charles R Greathouse IV, Table of n, a(n) for n = 1..62
Charles R Greathouse IV, GP script for computing terms using the Abatzoglou-Silverberg-Sutherland-Wong algorithm
MATHEMATICA
s = RecurrenceTable[{a[n] == 4 a[n - 1] - 7 a[n - 2] + 8 a[n - 3] - 4 a[n - 4], a[2] == 11, a[3] == 23, a[4] == 67, a[5] == 151}, a, {n, 2, 4000}]; Flatten@ Position[s, _Integer?PrimeQ] + 1 (* Michael De Vlieger, Jan 24 2016 *)
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Charles R Greathouse IV, Jan 15 2016
STATUS
approved