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A083196 a(n) = 8*n^4 + 9*n^2 + 2. 1
2, 19, 166, 731, 2194, 5227, 10694, 19651, 33346, 53219, 80902, 118219, 167186, 230011, 309094, 407027, 526594, 670771, 842726, 1045819, 1283602, 1559819, 1878406, 2243491, 2659394, 3130627, 3661894, 4258091, 4924306, 5665819, 6488102, 7396819, 8397826 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Minimal norm of a sequence of 3-D lattices that converges to the FCC lattice.

LINKS

Table of n, a(n) for n=0..32.

Index entries for linear recurrences with constant coefficients, signature (5,-10,10,-5,1).

MATHEMATICA

Table[8n^4+9n^2+2, {n, 0, 40}] (* Harvey P. Dale, Nov 26 2018 *)

CROSSREFS

Cf. A082942.

Sequence in context: A057858 A065898 A290188 * A037526 A037735 A224753

Adjacent sequences:  A083193 A083194 A083195 * A083197 A083198 A083199

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Nov 17 2008

STATUS

approved

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Last modified January 20 03:25 EST 2022. Contains 350467 sequences. (Running on oeis4.)