A366724 - OEIS

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A366724

First index k where A366574(k) = n.

1, 3, 8, 18, 37, 70, 123, 203, 318, 477, 690, 968, 1323, 1768, 2317, 2985, 3788, 4743, 5868, 7182, 8705, 10458, 12463, 14743, 17322, 20225, 23478, 27108, 31143, 35612, 40545, 45973, 51928, 58443, 65552, 73290, 81693, 90798, 100643, 111267, 122710, 135013, 148218, 162368, 177507, 193680

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

OFFSET

1,2

COMMENTS

See A366574 for further details.

LINKS

Table of n, a(n) for n=1..46.

FORMULA

Conjectured: for n > 1, a(n) = (n-1)*(n^3 + 3*n^2 - 10*n + 72)/24 .

CROSSREFS

Cf. A366574.

Sequence in context: A169763 A227161 A241080 * A332706 A000234 A136376

Adjacent sequences: A366721 A366722 A366723 * A366725 A366726 A366727

KEYWORD

nonn

AUTHOR

Scott R. Shannon, Oct 17 2023

STATUS

approved