26289

Appears in sequences

• Pair the odd numbers such that the k-th pair is (r, r+2k) where r is the smallest odd number not included earlier: (1, 3), (5, 9), (7, 13), (11, 19), (15, 25), (17, 29), (21, 35), (23, 39), (27, 45), ... This is the sequence of the product of the members of pairs.at n=39A075320
• a(n) is the least positive integer such that nextprime(a(n)^n) - prevprime(a(n)^n) = 4.at n=18A090125
• Number of n X 2 binary arrays with each 1 adjacent to exactly one 0 vertically and one 0 horizontally.at n=15A183344
• Number of all possible tetrahedra of any size and orientation, formed when intersecting the original regular tetrahedron by planes parallel to its sides and dividing its edges into n equal parts.at n=24A216173
• a(n) = (9*n^3 + 5*n)/2.at n=17A230018
• Positions of squares in A276573.at n=54A277014
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1) + 2*b(n-2), where a(0) = 1, a(1) = 2, b(0) = 3, and (a(n)) and (b(n)) are increasing complementary sequences.at n=16A294559
• Number of compositions (ordered partitions) of n into distinct parts where no part is a multiple of 5.at n=33A332311