81345
domain: N
Appears in sequences
- Number of diagonal dissections of an n-gon into 3 regions.at n=29A033275
- Upper central divisor of n-th primorial.at n=9A060796
- Duplicate of A060796.at n=9A061059
- Integers k such that k*28*c + 1 is prime for c = 1, 2, 4, 7 and 14.at n=25A067199
- a(n) = product of first n terms of A001359.at n=4A097489
- Structured small rhombicosidodecahedral numbers.at n=16A100148
- Octagonal numbers for which the sum of the digits is also an octagonal number.at n=16A117082
- Octagonal numbers which are the sums of exactly two positive octagonal numbers.at n=33A136346
- Coefficient of x in the reduction by x^2 -> x+1 of the polynomial p(n,x) defined at Comments.at n=20A192982
- Leading diagonal of triangle in A222310.at n=29A222311
- The smallest product of n distinct primes no larger than the (2n)-th to exceed the square root of the (2n)-th primorial.at n=4A260079
- a(n) = (n-1)*(n-2)*(n+3)*(n+2)/12.at n=31A299120