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A184114
n + floor(5*sqrt(n-1)); complement of A184115.
2
1, 7, 10, 12, 15, 17, 19, 21, 23, 25, 26, 28, 30, 32, 33, 35, 37, 38, 40, 41, 43, 44, 46, 47, 49, 51, 52, 53, 55, 56, 58, 59, 61, 62, 64, 65, 67, 68, 69, 71, 72, 74, 75, 76, 78, 79, 80, 82, 83, 85, 86, 87, 89, 90, 91, 93, 94, 95, 97, 98, 99, 101, 102, 103, 105, 106, 107, 108, 110, 111, 112, 114, 115, 116, 118, 119, 120, 121, 123, 124, 125, 127, 128, 129, 130, 132, 133, 134, 135, 137, 138, 139, 140, 142, 143, 144, 145, 147, 148, 149
OFFSET
1,2
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-1+Ceiling[(n^2-b)/a], {n, 90}]
CROSSREFS
Cf. A184115.
Sequence in context: A024586 A050419 A089373 * A345478 A295797 A153040
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Jan 09 2011
STATUS
approved