OFFSET
-1,1
REFERENCES
M. Aigner and G. M. Ziegler, Proofs from The Book, Springer-Verlag, Berlin, 1999; see p. 21.
LINKS
Harvey P. Dale, Table of n, a(n) for n = -1..195
EXAMPLE
a(1) = 4 + 2^2 = 8, a(2) = 4 + (2*3)^2 = 40.
MATHEMATICA
Join[{4, 5}, Table[4+Product[Prime[k], {k, n}]^2, {n, 15}]] (* Harvey P. Dale, Dec 04 2017 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jul 07 2000 Definition and offset changed by N. J. A. Sloane, Dec 04 2017
STATUS
approved