A078658 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A078658

a(0) = 1; for n>0, a(n) = 1 + coefficient of x^n in expansion of 1/Product_{ n >= 2, n not of the form 2^k-1 } (1-x^n).

1, 1, 2, 1, 3, 2, 4, 2, 6, 4, 9, 6, 13, 10, 19, 15, 28, 24, 41, 36, 59, 55, 85, 81, 121, 119, 171, 172, 240, 247, 335, 348, 464, 490, 639, 681, 874, 941, 1190, 1289, 1610, 1756, 2168, 2375, 2904, 3197, 3873, 4276, 5141, 5693, 6796, 7541, 8945, 9946, 11730, 13058, 15322, 17078

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

COMMENTS

a(n) = number of cobordism classes in dimension n.

REFERENCES

Robert E. Stong, Notes on Cobordism Theory, Princeton Univ. Press, 1968.

LINKS

Table of n, a(n) for n=0..57.

CROSSREFS

Cf. A078657.

Sequence in context: A365876 A179080 A294199 * A307719 A351594 A185314

Adjacent sequences: A078655 A078656 A078657 * A078659 A078660 A078661

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 15 2002

STATUS

approved