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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.
2
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
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.
Sequence in context: A161542 A131195 A020217 * A329728 A141066 A018196
KEYWORD
nonn
AUTHOR
EXTENSIONS
a(43) in b-file corrected by Kebbaj Mohamed Reda, May 29 2024
STATUS
approved