A176538 - OEIS

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A176538

Partial sums of A018891.

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 December 4 22:39 EST 2023. Contains 367565 sequences. (Running on oeis4.)