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A184116
a(n) = n + floor(5*sqrt(n + 1)).
0
8, 10, 13, 15, 17, 19, 21, 23, 24, 26, 28, 30, 31, 33, 35, 36, 38, 39, 41, 42, 44, 45, 47, 49, 50, 51, 53, 54, 56, 57, 59, 60, 62, 63, 65, 66, 67, 69, 70, 72, 73, 74, 76, 77, 78, 80, 81, 83, 84, 85, 87, 88, 89, 91, 92, 93, 95, 96, 97, 99, 100, 101, 103, 104, 105, 106, 108, 109, 110, 112, 113, 114, 116, 117, 118, 119, 121, 122, 123, 125, 126, 127, 128, 130, 131, 132, 133, 135, 136, 137, 138, 140, 141, 142, 143, 145, 146, 147, 149, 150
OFFSET
1,1
FORMULA
a(n) = n + floor(5*sqrt(n+1)).
MATHEMATICA
a=25; b=25; Table[n+Floor[(a*n+b)^(1/2)], {n, 100}]
Table[n+Floor[5*Sqrt[n+1]], {n, 100}] (* Harvey P. Dale, Aug 31 2023 *)
CROSSREFS
Sequence in context: A070479 A335172 A356522 * A319795 A068358 A203322
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Jan 09 2011
EXTENSIONS
Definition corrected by Georg Fischer, Aug 28 2021
STATUS
approved