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A022775
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Place where n-th 1 occurs in A007336.
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0
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1, 3, 6, 11, 17, 25, 34, 44, 56, 69, 84, 100, 117, 136, 156, 178, 201, 226, 252, 279, 308, 338, 370, 403, 437, 473, 510, 549, 589, 631, 674, 718, 764, 811, 860, 910, 961, 1014, 1068, 1124, 1181, 1239, 1299, 1360, 1423, 1487, 1553, 1620, 1688
(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=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(sqrt(2)*k)) [From Benoit Cloitre (benoit784c(AT)orange.fr), Jan 24 2009]
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CROSSREFS
| Sequence in context: A109413 A003022 A025722 * A025743 A022338 A119639
Adjacent sequences: A022772 A022773 A022774 * A022776 A022777 A022778
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KEYWORD
| nonn
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AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu)
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