101269

Appears in sequences

• Stella octangula numbers: a(n) = n*(2*n^2 - 1).at n=37A007588
• a(n) = binomial(n+5,4) - 1.at n=36A063258
• Expansion of (1-x)/(1-x+x^2-2*x^3).at n=45A078015
• One sixth area of primitive Pythagorean triangles having legs that add up to a square, sorted on hypotenuse.at n=4A089550
• Numerator of sum of reciprocals of first n 5-simplex numbers A000389.at n=36A118431
• Integers n such that the century defined by the interval [100n+1, 100n+100] (i.e., the (n+1)-st century) contains exactly one Ormiston prime pair and no other primes.at n=16A162895
• Small rhombicuboctahedron with faces of centered polygons.at n=18A193250
• Numerators of r(n) := Sum_{k=0..n-1} 1/Product_{j=0..4} (k + j + 1), for n >= 0, with r(0) = 0.at n=37A300298
• Numbers k such that k and k+1 have at least 4 but not both exactly 4 distinct prime factors.at n=33A321494
• Numbers being the smallest positive integer having its digits (Cf. A179239) from which two digits can be chosen, the difference being any value from 0 to 9.at n=2A365375