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A062876 Numbers of lattice points corresponding to incrementally largest circle radii in A062875. 2
4, 12, 20, 28, 44, 52, 68, 76, 92, 116, 124, 148, 164, 172, 188, 212, 236, 244, 268, 284, 292, 316, 332, 356, 388, 404, 412, 428, 436, 452, 508, 524, 548, 556, 596, 604, 628, 652, 668, 692, 716, 724, 764, 772, 788, 796, 844, 892, 908, 916, 932, 956, 964 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Ray Chandler, Table of n, a(n) for n = 1..10000

Eric Weisstein's World of Mathematics, Circle Lattice Points

FORMULA

a(n) = A017113(A111333(n)-1) = 8*A111333(n) - 4.

a(n) = A001749(n), n>1.  - Paolo P. Lava, Feb 02 2012

MATHEMATICA

Join[{4}, Table[4 Prime[n], {n, 2, 50}]] (* Vincenzo Librandi, May 08 2015 *)

PROG

(MAGMA) [4] cat [4*NthPrime(n): n in [2..60]]; // Vincenzo Librandi, May 08 2015

(PARI) a(n)=if(n>1, 4*prime(n), 4) \\ Charles R Greathouse IV, May 08 2015

CROSSREFS

Cf. A046112, A062875.

Sequence in context: A017113 A316489 A081770 * A301098 A301267 A238836

Adjacent sequences:  A062873 A062874 A062875 * A062877 A062878 A062879

KEYWORD

easy,nonn

AUTHOR

Eric W. Weisstein

EXTENSIONS

Edited and extended by Ray Chandler, Jan 05 2012

STATUS

approved

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Last modified November 12 04:21 EST 2019. Contains 329051 sequences. (Running on oeis4.)