A118477 Number of nonassociative rings with <= n elements.

1, 3, 5, 60, 62, 66, 68, 801356, 801521, 801525, 801527, 801637, 801639, 801643, 801647

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 * A380422 A320082 A273254

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