30735

Appears in sequences

• Number of Barlow packings that repeat after exactly n layers.at n=22A011768
• Triangular matrix, read by rows, where row k is formed from the first differences of row (k-1) of its matrix square, with an appended '1' for the main diagonal.at n=51A102225
• Number of Barlow packings that repeat after n (or a divisor of n) layers.at n=22A114438
• Integers i such that 9*i = 25 X i, but 17*i is not 49 X i.at n=27A115811
• Numbers whose binary representation is the concatenation of n 1's, 2n-1 digits 0 and n 1's.at n=3A147539
• Integers n such that 17+30*n are terms in A172456.at n=18A175103
• Number of distinct hexaflexagons of length n.at n=20A286110
• Number of different closest packings of equal spheres for hexagonal crystals having repeat period n.at n=22A371991