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A022775 Place where n-th 1 occurs in A007336. 2
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; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..49.

FORMULA

a(n) = 1 + Sum_{k=1..n-1} ceiling(sqrt(2)*k). - Benoit Cloitre, Jan 24 2009

PROG

(PARI) a(n)=1+sum(k=1, n-1, ceil(sqrt(2)*k)) \\ Benoit Cloitre, Jan 24 2009

CROSSREFS

Cf. A007336.

Sequence in context: A294397 A003022 A025722 * A025743 A022338 A263807

Adjacent sequences:  A022772 A022773 A022774 * A022776 A022777 A022778

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified August 7 12:19 EDT 2020. Contains 336276 sequences. (Running on oeis4.)