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A187331 Sum(floor(kn/4), k=1,2,3,4); complement of A187332. 2
0, 1, 4, 6, 10, 11, 14, 16, 20, 21, 24, 26, 30, 31, 34, 36, 40, 41, 44, 46, 50, 51, 54, 56, 60, 61, 64, 66, 70, 71, 74, 76, 80, 81, 84, 86, 90, 91, 94, 96, 100, 101, 104, 106, 110, 111, 114, 116, 120, 121, 124, 126, 130, 131, 134, 136, 140, 141, 144, 146, 150, 151, 154, 156, 160, 161, 164, 166, 170, 171, 174, 176, 180, 181, 184, 186, 190, 191, 194, 196, 200, 201, 204, 206, 210, 211, 214, 216, 220, 221, 224, 226, 230, 231, 234, 236, 240, 241, 244, 246, 250, 251, 254 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..102.

FORMULA

a(n)=sum(floor(kn/4), k=1,2,3,4).

MATHEMATICA

t=Table[Sum[Floor[k*n/4], {k, 1, 4}], {n, 0, 200}]  (* A187331 *)

Complement[Range[Length[t]], t]                (* A187332 *)

CROSSREFS

Cf. A187332.

Sequence in context: A185002 A110604 A109270 * A184923 A137877 A174240

Adjacent sequences:  A187328 A187329 A187330 * A187332 A187333 A187334

KEYWORD

nonn

AUTHOR

Clark Kimberling, Mar 08 2011

STATUS

approved

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Last modified May 21 08:28 EDT 2013. Contains 225478 sequences.