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A022776
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Place where n-th 1 occurs in A023115.
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0
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1, 2, 4, 7, 10, 14, 19, 24, 30, 37, 45, 53, 62, 72, 82, 93, 105, 118, 131, 145, 160, 175, 191, 208, 225, 243, 262, 282, 302, 323, 345, 367, 390, 414, 439, 464, 490, 517, 544, 572, 601, 630, 660, 691, 723, 755, 788, 822, 856, 891, 927, 964, 1001
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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FORMULA
| a(n)=1+sum(k=1,n-1,ceil(r*k)) where r=1/sqrt(2) [From Benoit Cloitre (benoit784c(AT)orange.fr), Jan 24 2009]
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PROG
| (PARI) a(n)=1+sum(k=1, n-1, ceil(k/sqrt(2))) [From Benoit Cloitre (benoit784c(AT)orange.fr), Jan 24 2009]
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CROSSREFS
| Sequence in context: A022339 A025711 A117634 * A025704 A025710 A023536
Adjacent sequences: A022773 A022774 A022775 * A022777 A022778 A022779
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KEYWORD
| nonn
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AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu)
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