24287

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 27 ones.at n=10A031795
• n-th 6k+1 prime times n-th 6k-1 prime.at n=17A048629
• At stage 1, start with a unit equilateral equiangular triangle. At each successive stage add 3*(n-1) new triangles around outside with edge-to-edge contacts. Sequence gives number of triangles (regardless of size) at n-th stage.at n=37A064412
• Numbers n such that sigma(n+2) - sigma(n) = prime(n+2) - prime(n).at n=12A067058
• Numbers m such that m and m+2 are both brilliant numbers, where brilliant numbers are semiprimes whose prime factors have an equal number of decimal digits, or whose prime factors are equal.at n=12A083284
• a(n) = prime(n)*prime(n+3).at n=34A090090
• 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, 1, 1), (0, 0, -1), (1, 0, -1), (1, 1, 0)}.at n=9A148950
• A213784/12.at n=38A213789
• S_9 sequence in partition of integers > 1 described in A240521.at n=41A240536
• Total number of torsion-free congruence subgroups of PSL(2,Z) of genus n.at n=19A258696
• Sequence of pairwise relatively prime numbers of class P_6 (see comment in A275246).at n=18A275251
• Number of integer partitions of n with a different mean, median, and mode, assuming there is a unique mode.at n=44A363725