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A176538 Partial sums of A018891. 0
0, 0, 1, 1, 2, 2, 3, 4, 5, 8, 10, 17, 26, 43, 90 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

Partial sums of number of positive knots with n crossings. The subsequence of distinct primes in this partial sum begins: 2, 3, 5, 17, 43.

LINKS

Table of n, a(n) for n=1..15.

Index entries for sequences related to knots

FORMULA

a(n) = SUM[i=1..n] A018891(i).

EXAMPLE

a(15) = 0 + 0 + 1 + 0 + 1 + 0 + 1 + 1 + 1 + 3 + 2 + 7 + 9 + 17 + 47 = 90.

CROSSREFS

Cf. A018891.

Sequence in context: A228693 A116676 A240575 * A285261 A100483 A182613

Adjacent sequences:  A176535 A176536 A176537 * A176539 A176540 A176541

KEYWORD

nonn

AUTHOR

Jonathan Vos Post, Apr 19 2010

STATUS

approved

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Last modified January 27 15:07 EST 2022. Contains 350607 sequences. (Running on oeis4.)