23647
domain: N
Appears in sequences
- Numbers k such that 9*2^k - 1 is prime.at n=30A002236
- "BIJ" (reversible, indistinct, labeled) transform of 1,1,1,1,...at n=7A032109
- Numbers k such that x^k + x^7 + 1 is irreducible over GF(2).at n=42A057477
- Numbers k>7 such that x^k + x^7 + x^6 + x^5 + x^4 + x^3 + x^2 + x + 1 is irreducible over GF(2).at n=29A057485
- Exponential convolution of A000670(n), with A000670(0)=0, with the sequence of all ones alternating in sign.at n=7A089677
- Indices of primes in sequence defined by A(0) = 69, A(n) = 10*A(n-1) - 71 for n > 0.at n=8A101521
- a(n) is the number of m <= 2^n which are in A075190, i.e., such that m^2 is exactly at the center between two consecutive primes, or in other words A056929(m) = 0.at n=18A101593
- Triangle, read by rows, equal to the matrix cube of triangle P = A135880.at n=31A135888
- Triangle, read by rows, equal to R^4, the matrix 4th power of R = A135894.at n=16A135897
- A (1, -2) Somos-4 sequence associated to the elliptic curve E: y^2 - 3*x*y - y = x^3 - x.at n=11A178622
- Reduced division polynomials associated with elliptic curve y^2 + x*y = x^3 - x^2 - x + 1 and multiples of point (0, 1).at n=22A242107
- a(n) = abs(A242107(n)).at n=22A242108