20658

Appears in sequences

• Numbers n > 13 such that x^n + x^13 + x^12 + x^11 + x^10 + x^9 + x^8 + x^7 + x^6 + x^5 + x^4 + x^3 + x^2 + x + 1 is irreducible over GF(2).at n=40A057489
• Sum of the areas of triangles whose vertices lie on the n X n grid with unit spacing as enumerated in A045996.at n=5A061144
• Coefficients of the C-Dyson Mod 27 identity.at n=39A104503
• Numbers k for which (7+k!)/7 is prime.at n=19A139065
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, 0, 0), (0, -1, 1), (1, 0, 0), (1, 1, 0)}.at n=8A150334
• Number of non-equivalent ways to place 2 non-attacking kings on an n X n board.at n=23A279111
• Numbers k such that (424*10^k - 1)/9 is prime.at n=18A295626
• Partial sums of A299291.at n=25A299292
• Numbers k for which rank of the elliptic curve y^2=x^3+k*x is 4.at n=19A309031
• Numbers that are the sum of four fourth powers in exactly two ways.at n=40A344193