A187717 a(n) = A001676(n) / A187595(n).

1, 1, 1, 1, 1, 1, 1, 2, 4, 6, 1, 1, 3, 2, 2, 2, 8, 16, 2, 24, 4, 4, 48, 2, 2, 12, 1, 2, 3, 3, 4, 8, 16, 32, 4, 6, 12, 120, 96, 192, 16, 96, 1, 8, 5760, 48, 96, 32, 6, 24, 16, 24, 16, 8, 3, 1, 4, 4, 4, 4, 1, 24, 16

Offset: 1

Author

Paul Muljadi, Mar 18 2011

Keywords

• nonn
• hard

Comments

The quotient of |Theta_n| and |bP_(n+1)| in the 1961 Kervaire-Milnor theorem.

The quotient of |S_n| and |S_n^{bp}| in the 2011 Milnor survey (see Theorem 5, Further Details, and Table 2). - Jonathan Sondow, Jun 16 2011

Links

• Michel A. Kervaire and John W. Milnor, Groups of homotopy spheres: I, 1963
• Michel A. Kervaire and John W. Milnor, Groups of homotopy spheres: I. Ann. of Math. (2) 77 1963, 504-537.
• John W. Milnor, Differential Topology Forty-six Years Later, Notices Amer. Math. Soc. 58 (2011), 804-809.
• John W. Milnor, Spheres, Abel Prize lecture (video), 2011.
• Wikipedia, Exotic sphere

Extensions

More terms from Jonathan Sondow, Jun 16 2011

Terms a(56), a(57), a(63) corrected by Andrey Zabolotskiy, Nov 27 2022