A183866 - OEIS

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A183866

n+floor(2*sqrt(n-1)); complement of A035106.

1, 4, 5, 7, 9, 10, 11, 13, 14, 16, 17, 18, 19, 21, 22, 23, 25, 26, 27, 28, 29, 31, 32, 33, 34, 36, 37, 38, 39, 40, 41, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53, 54, 55, 57, 58, 59, 60, 61, 62, 64, 65, 66, 67, 68, 69, 70, 71, 73, 74, 75, 76, 77, 78, 79, 81, 82, 83, 84, 85, 86, 87, 88, 89, 91, 92, 93, 94, 95, 96, 97, 98, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 111, 112, 113, 114, 115, 116, 117, 118, 119

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..100.

MATHEMATICA

a=4; b=-4;

Table[n+Floor[(a*n+b)^(1/2)], {n, 100}]

Table[n-1+Ceiling[(n*n-b)/a], {n, 70}]

CROSSREFS

Cf. A035106.

Sequence in context: A081095 A080596 A376598 * A196004 A185600 A191771

Adjacent sequences: A183863 A183864 A183865 * A183867 A183868 A183869

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Jan 07 2011

STATUS

approved