A003177 - OEIS

A003177

a(n) = ceiling(24(2^n-1)/n).

24, 36, 56, 90, 149, 252, 436, 765, 1363, 2456, 4467, 8190, 15122, 28086, 52428, 98303, 185042, 349524, 662258, 1258290, 2396744, 4575604, 8753330, 16777215, 32212254, 61946643, 119304647, 230087533, 444306961, 858993459, 1662567985, 3221225472, 6247225158, 12126966483

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

OFFSET

1,1

LINKS

Paolo Xausa, Table of n, a(n) for n = 1..1000

R. J. Penrose, Puzzle, Twistor Newsletter, No. 10 (July 1980), p. 22.

R. J. Penrose, Puzzle, Twistor Newsletter, No. 10 (July 1980), p. 22. [Cached copy]

R. J. Penrose, Solution to puzzle, Twistor Newsletter, No. 41, p. 37, 1996.

R. J. Penrose, Solution to puzzle, Twistor Newsletter, No. 41, p. 37, 1996. [Cached copy]

MATHEMATICA

A003177[n_] := Ceiling[24*(2^n - 1)/n]; Array[A003177, 35] (* Paolo Xausa, Apr 16 2026 *)

PROG