42130

Appears in sequences

• Coordination sequence for root lattice B_5.at n=6A022147
• Square array A(n,k) read by antidiagonals: coordination sequence for lattice B_n.at n=51A103883
• Product of the first n 5-almost primes (A014614), divided by product of the first n primes, rounded down.at n=3A122609
• Moore lower bound on the order of a (9,g)-cage.at n=8A198309
• In base 5, numbers n which have 5 distinct digits, do not start with 0, and have property that the product (written in base 5) of any two adjacent digits is a substring of n.at n=17A210016
• Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and 2w+x+y>0.at n=22A211617
• Sum of squares of cycle lengths for different cycles in Fibonacci-like sequences modulo n.at n=31A233246
• a(n) = (9*8^n - 2)/7.at n=5A238276
• Indices where A092243 strictly changes sign.at n=12A269737
• a(n) is the position of the first occurrence of n^3 in the concatenation of the positive integers in decimal representation.at n=21A290787
• a(n) is the least number k such that the sum of n^2 consecutive primes starting at prime(k) is a square.at n=18A357813