A370999 - OEIS

A370999

Least composite number k such that the number m of consecutive composite sums k + j*(j+1)/2, j = 1, ..., m is a new maximum.

4, 8, 9, 15, 24, 90, 105, 114, 225, 264, 300, 945, 5349, 7035, 11739, 17280, 35475, 46914, 190365, 351645, 603054, 1209900, 3146220, 3279864, 6407664, 26447649, 115192665, 408291345, 1080430119, 1298351109, 6459163344, 7731193299, 8096124894, 8884256514, 18927105834

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

OFFSET

1,1

COMMENTS

a(57) > 1.2 * 10^14.

LINKS

Karl-Heinz Hofmann and Hugo Pfoertner, Table of n, a(n) for n = 1..56

IBM Research, Composite Sequences, Ponder This Challenge March 2024.

CROSSREFS

A371000 gives the corresponding counts m.

Cf. A000217, A371001, A371002.

Sequence in context: A161542 A131195 A020217 * A329728 A141066 A018196