A292104 Number of interior points that are the intersections of exactly two chords in the configuration A006561(n).

0, 0, 0, 1, 5, 12, 35, 40, 126, 140, 330, 228, 715, 644, 1365, 1168, 2380, 1512, 3876, 3360, 5985, 5280, 8855, 6144, 12650, 11284, 17550, 15680, 23751, 13800, 31465, 28448, 40920, 37264, 52360, 42444, 66045, 60648, 82251, 75720, 101270, 75012, 123410, 114400, 148995, 138644, 178365, 152064

Offset

1,5

Links

Scott R. Shannon, Table of n, a(n) for n = 1..120

Crossrefs

Cf. A006561. Column k=2 of A292105.

Sequence in context: A066280 A333886 A192243 * A136113 A298992 A050189

Adjacent sequences: A292101 A292102 A292103 * A292105 A292106 A292107

Keyword

nonn

Author

N. J. A. Sloane, Sep 14 2017

Extensions

a(31)-a(48) from Scott R. Shannon, Mar 04 2022

Status

approved