4194262

Appears in sequences

• Let r(n) be the real positive root of Sum_{k=1..n} x^k = 1, then a(n) = round(1/(r(n) - 1/2)).at n=19A079460
• Row sums of triangle A132731.at n=21A132732
• Row sums of triangle A132823.at n=22A132824
• Rectangular array A read by upward antidiagonals in which the entry in row n and column k is defined by A(n,k) = (2^a(n)*(6*k - (3 - (-1)^a(n))*(1 - (-1)^n)/2) - 2^n + 4)/6, n,k >= 1, where {a(n)} is the Beatty sequence A117630 defined by a(n) = floor(n*log(3)/log(3/2)).at n=37A254312
• The real part of b(n) where b(n) = (n + b(n-1)) * (1 + i) with b(-1)=0; i = sqrt(-1).at n=42A309878
• Number of ways to select 3 or more collinear points from a 4 X n grid.at n=19A355552