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A118477 Number of nonassociative rings with <= n elements. 0
1, 3, 5, 60, 62, 66, 68, 801356, 801521, 801525, 801527, 801637, 801639, 801643, 801647 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Partial sums of A037292 Number of nonassociative rings with n elements.

REFERENCES

"Reviews in Ring Theory, 1980-1984", American Mathematical Society, 1986; ISBN 0-8218-0097-3.

LINKS

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

FORMULA

a(n) = Sum_{i=1..n} A037292(i).

EXAMPLE

a(15) = 1 + 2 + 2 + 55 + 2 + 4 + 2 + 801288 + 165 + 4 + 2 + 110 + 2 + 4 + 4 = 801647.

CROSSREFS

Cf. A027623, A037292.

Sequence in context: A158314 A249011 A261533 * A320082 A273254 A222644

Adjacent sequences:  A118474 A118475 A118476 * A118478 A118479 A118480

KEYWORD

nonn,more

AUTHOR

Jonathan Vos Post, May 05 2006

EXTENSIONS

Data corrected by Giovanni Resta, Jun 16 2016

STATUS

approved

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Last modified May 24 06:53 EDT 2019. Contains 323529 sequences. (Running on oeis4.)