A368371 AGM transform of powers of 2.

0, 4, 1016, 547856, 813732832, 3903659417664, 67987041960443776, 4575641535535493153024, 1216334976081196096854162944, 1285452910821757852273429343896576, 5415346123378152397099190627515485911040, 91076602434014222291049466570765323207327092736

Offset

1,2

Comments

See A368366 for further information.

Links

Paolo Xausa, Table of n, a(n) for n = 1..55

Mathematica

A369394[n_] := (2^(n+1)-2)^n - n^n*2^(n*(n+1)/2);
Array[A369394, 15] (* Paolo Xausa, Jan 29 2024 *)

Prog

(Python)
def A368371(n): return ((1<<n+1)-2)**n-n**n*(1<<(n*(n+1)>>1)) # Chai Wah Wu, Jan 25 2024

Crossrefs

Cf. A368366.

Sequence in context: A087365 A024059 A069920 * A217024 A013780 A139300

Adjacent sequences: A368368 A368369 A368370 * A368372 A368373 A368374

Keyword

nonn

Author

N. J. A. Sloane, Jan 24 2024

Status

approved