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A292104 Number of interior points that are the intersections of exactly two chords in the configuration A006561(n). 8
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 (list; graph; refs; listen; history; text; internal format)
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,more

AUTHOR

N. J. A. Sloane, Sep 14 2017

EXTENSIONS

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

STATUS

approved

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Last modified June 27 16:27 EDT 2022. Contains 354896 sequences. (Running on oeis4.)