30184
domain: N
Appears in sequences
- Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite EDI = Edingtonite Ba2[Al4Si6O20].8H2O starting with a T2 atom.at n=6A019013
- Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite THO = Thomsonite Na4Ca8[Al20Si20O80].24H2O starting at a T1 atom.at n=6A019062
- Positions of partition numbers in the EKG sequence.at n=38A159032
- Number of pairs of intersecting diagonals in the exterior of a regular n-gon.at n=25A211381
- Number of 3 X n arrays of the minimum value of corresponding elements and their horizontal, vertical or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 3 X n array.at n=11A219817
- Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally and vertically.at n=2A253929
- Number of (n+2)X(3+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally and vertically.at n=1A253930
- T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally and vertically.at n=7A253935
- T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally and vertically.at n=8A253935
- Successive integers produced by Conway's PRIMEGAME, starting with 12 rather than 2.at n=23A273099
- Triangle read by rows: T(n,m) is the number of pattern classes in the (n,m)-rectangular grid with 7 colors and n>=m, two patterns are in the same class if one of them can be obtained by a reflection or 180-degree rotation of the other.at n=8A286895
- Number of triangular regions in a "frame" of size n X n (see Comments in A331776 for definition), divided by 4.at n=23A332595
- Numbers k which are the product of a cube greater than 1 and a prime, and where k-1 and k-2 are semiprimes.at n=41A350284
- Numbers whose square and cube taken together contain each decimal digit at least twice.at n=17A363909