83657
domain: N
Appears in sequences
- Fermat coefficients.at n=16A000971
- a(n) = floor(binomial(n,5)/6).at n=38A011843
- a(n) = ceiling(binomial(n,6)/n).at n=38A053643
- Expansion of -x * (21*x^7+65*x^6+77*x^5+39*x^4-17*x^3-38*x^2-11*x-1) / ((x+1) * (x^3+x^2-1) * (x^4+2*x^3+x^2+x-1)).at n=13A122015
- Expansion of 1 / (1 - x - x^2 + x^3 - x^5 + x^15 - x^17 - x^18 + x^19 + x^20).at n=32A174650
- Number of 0..n arrays x(0..4) of 5 elements without any interior element greater than both neighbors or less than both neighbors.at n=15A200873
- -7-Knödel numbers.at n=38A225511
- Number of non-equivalent binary n X n matrices with two nonadjacent 1's.at n=33A232567
- a(n) = n*(n + 1)*(n^2 + n + 22)/24.at n=37A318054