27124

Appears in sequences

• Numbers k such that 21*2^k+1 is prime.at n=29A032360
• E.g.f. A(x) satisfies exp(A(x)) = x + exp(A(x)^2) where A(0) = 0.at n=6A138014
• Number of arrangements of 4 nonzero numbers x(i) in -n..n with the sum of x(i)*x(i+1) equal to zero.at n=33A188250
• Triangle, read by rows of n^2 terms, where row n equals the coefficients in the series reversion of the function G(y,n)-1 such that: y = Sum_{m>=1} 1/G(y,n)^(2*n*m) * Product_{k=1..m} (1 - 1/G(y,n)^(2*k-1)).at n=37A214690
• Number of palstars of length 2n over an alphabet of size 2.at n=9A246019
• Concatenate the terms of A027750 (omitting spaces and commas), chop into blocks of length 5, then omit any leading zeros.at n=23A362446