27192

Appears in sequences

• Alkane (or paraffin) numbers l(9,n).at n=15A018210
• Number of series-reduced dyslexic planted compound windmills with n leaves.at n=11A032292
• Number of ways to place a non-attacking white and black king on n X n chessboard.at n=12A035286
• 5-digit terms in the continued fraction for Pi.at n=9A048960
• Numbers k such that k * (1+i)^k - 1 is a Gaussian prime.at n=27A058771
• Numbers n such that n * 2^(n/2) - 1 is prime.at n=13A058775
• Numbers k such that 2^(2*k+1) + 2^k + 1 is prime.at n=40A105180
• Number of permutations of floor(i*7/4), i=0..n-1, with all sums of 3 adjacent terms unique.at n=7A152322
• a(n) = 25*n^2 - n.at n=32A157514
• a(n) = 1089*n^2 - 33.at n=4A158692
• Given M = triangle A122196 as an infinite lower triangular matrix, this sequence is lim_{k->infinity} M^k.at n=33A171238
• Number of parts that are visible in one of the three views of the section model of partitions version "tree" with n sections.at n=35A194805
• a(0)=a(1)=1, a(n) = least k > a(n-1) such that k*a(n-2) is a triangular number.at n=37A214961
• Equals two maps: number of nX3 binary arrays indicating the locations of corresponding elements equal to exactly two of their king-move neighbors in a random 0..1 nX3 array.at n=5A220244
• T(n,k)=Equals two maps: number of nXk binary arrays indicating the locations of corresponding elements equal to exactly two of their king-move neighbors in a random 0..1 nXk array.at n=30A220247
• T(n,k)=Equals two maps: number of nXk binary arrays indicating the locations of corresponding elements equal to exactly two of their king-move neighbors in a random 0..1 nXk array.at n=33A220247
• Row "sums" of triangle A245618, using the operation <+> defined in A245618.at n=20A249768
• Number of n-element subsets of [n+6] having an even sum.at n=15A282082
• Number of degree 5 vertices in the n-Menger sponge graph.at n=3A367706