A370825 -id:A370825 - cp's OEIS frontend

A370826 a(n) are the denominators corresponding to A370825(n).

2, 1, 14, 1, 62, 3, 254, 17, 1022, 31, 178, 3, 16382, 5461, 65534, 257, 262142, 657, 1048574, 1271, 4194302, 60787, 356962, 12291, 67108862, 22369621, 268435454, 617093, 1073741822, 149943, 4294967294, 16843009, 746950834, 5726623061, 967879954, 981, 274877906942

Offset: 1

Hugo Pfoertner, Mar 08 2024

See A370825 for more information.

			A370825(n)/a(n) for n=1..14: 3/2, 2, 39/14, 4, 363/62, 26/3, 3279/254, 328/17, 29523/1022, 1342/31, 11553/178, 292/3, 2391483/16382, 1195742/5461.

Paolo Xausa, Table of n, a(n) for n = 1..2000

A370825 are the corresponding numerators.

Cf. A370823, A370824.

Array[Denominator[3/4*(3^#-1)/(2^#-1)] &, 50] (* Paolo Xausa, Mar 11 2024 *)

a370826(n) = denominator((3/4) * (3^n - 1) / (2^n - 1));

from math import gcd
def A370826(n): return (a:=(1<>1) # Chai Wah Wu, Mar 10 2024

A370825(n)/a(n) = (3/4) * (3^n - 1) / (2^n - 1).

A370827 a(n) is the numerator of the ratio of winning probabilities P_A/P_B of winning in a 2-player game with a ratio of odds for A and B in a single round of 3:2. To win the game it is necessary to win n rounds in a row.

Original entry on oeis.org

3, 63, 1053, 16443, 250533, 28431, 56859813, 853737003, 12811093893, 17472421953, 2883131020773, 25013333547, 648727335888453, 9730949220408843, 145964473398624933, 128792265384372219, 32842036136344638213, 3703989419737954191, 7389459197057088616293, 10076535434903231752353

Offset: 1

Hugo Pfoertner, Mar 09 2024

If you play the game with odds of 3:2 with one dice, you can decide what happens to the unused number. In the present sequence, this number is ignored without effect. However, if one defines the occurrence of the 6th number as a draw, which interrupts consecutive wins by both players, then the sequence pair A370825/A370826 results. The addition of a draw increases the odds ratio in favor of the player who has the higher chance of winning a single round. The relative advantage is small with 2 games to be won, i.e., 2/(63/32)-1 = 1/63, with 3 rounds 1/27, with 4 rounds 965/16443, but increases with a higher number of consecutive rounds to be won, and reaches asymptotically 1/8.

			a(n)/A370828(n) for n = 1..8: 3/2, 63/32, 1053/392, 16443/4352, 250533/46112, 28431/3584, 56859813/4860032, 853737003/49160192.

A370828 are the corresponding denominators.

Cf. A370823, A370824, A370825, A370826.

a370827(n) = numerator((2/3) * (3/5)^n * ((5/2)^n - 1) / (1 - (3/5)^n))

from math import gcd
def A370827(n): return (a:=3**(n-1)*(5**n-(1<Chai Wah Wu, Mar 12 2024

a(n)/A370828(n) = (2/3) * (3/5)^n * ((5/2)^n - 1) / (1 - (3/5)^n).

cp's OEIS Frontend

A370826 a(n) are the denominators corresponding to A370825(n).

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