171700

Appears in sequences

• Dodecahedral numbers: a(n) = n*(3*n - 1)*(3*n - 2)/2.at n=34A006566
• a(n) = binomial coefficient C(n,99).at n=3A017763
• 1/6 of product of three numbers: n-th prime, previous and following number.at n=25A127920
• Triangle T, read by rows, where row n+1 of T = row n of matrix power T^(2n) with appended '1' for n>=0 with T(0,0)=1.at n=49A132610
• Sum of two consecutive primes that is also sum of two consecutive even positive squares.at n=20A236461
• Triangle T(n, k) = Numbers of inequivalent (mod D_3) ways to place k points on a triangular grid of side n so that no three of them are vertices of an equilateral triangle of any orientation. Triangle read by rows.at n=48A243141
• 8-digit numbers (padded with leading zeros where necessary) in which the sum of the number consisting of the first four digits and the number consisting of the last four digits equals the number consisting of the middle four digits.at n=34A293686
• a(n) = (5*n + 5)*(5*n + 6)*(5*n + 7)/6.at n=19A300523