The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A369026 a(n) = floor(n^(n - 1) / 2) for n > 0 and otherwise 0. 3
 0, 0, 1, 4, 32, 312, 3888, 58824, 1048576, 21523360, 500000000, 12968712300, 371504185344, 11649042561240, 396857386627072, 14596463012695312, 576460752303423488, 24330595937833434240, 1092955779869348265984 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 LINKS Table of n, a(n) for n=0..18. MATHEMATICA A369026[n_] := If[n > 0, Floor[n^(n-1) / 2], 0]; Array[A369026, 30, 0] (* Paolo Xausa, Jan 12 2024 *) PROG (SageMath) def A369026(n): return n^(n - 1) // 2 if n > 0 else 0 print([A369026(n) for n in range(22)]) CROSSREFS Cf. A000169, A369025, A369027. Sequence in context: A231258 A294592 A197715 * A237019 A260155 A047734 Adjacent sequences: A369023 A369024 A369025 * A369027 A369028 A369029 KEYWORD nonn AUTHOR Peter Luschny, Jan 12 2024 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified July 19 19:50 EDT 2024. Contains 374436 sequences. (Running on oeis4.)