705894
domain: N
Appears in sequences
- a(n) = 7^n - n^6.at n=7A024081
- Numbers of form 6^i*7^j, with i, j >= 0.at n=34A025626
- a(n) = n*7^n.at n=6A036293
- Triangle whose (i,j)-th entry is binomial(i,j)*7^(i-j)*7^j.at n=22A038273
- Triangle whose (i,j)-th entry is binomial(i,j)*7^(i-j)*7^j.at n=26A038273
- T(n,n+1), array T as in A047150.at n=11A047156
- First differences of 7^n (A000420).at n=7A055272
- a(n) = phi(n^n).at n=6A064447
- Number of endofunctions of [n] such that 1 is not a fixed point.at n=6A066274
- Number of closed walks of length n at a vertex of the cyclic graph on 9 nodes C_9.at n=22A094233
- Number of palindromes of length n (in base 7).at n=12A117859
- Number of palindromes of length n (in base 7).at n=13A117859
- Spiral tiling numbers.at n=21A137333
- Triangle interpolating between the subsets of an n-set (A000079) and the trees on n labeled nodes (A000272) (read by rows).at n=26A154715
- a(n) = 7^n*Catalan(n).at n=5A156266
- Denominator of Bernoulli(n, 1/7).at n=6A158475
- Number of permutations of 6 indistinguishable copies of 1..n arranged in a circle with exactly 1 local maximum.at n=5A159736
- E.g.f.: A(x,y) = LambertW(x*y*exp(x))/(x*y*exp(x)), as a triangle of coefficients T(n,k) = [x^n*y^k/n! ] A(x,y), read by rows.at n=34A161628
- Triangle, read by rows, where T(n,k) = k!*C(n, k)*7^(n-k) for n>=0, k=0..n.at n=30A218017
- T(n,k) is the number of s in {1,...,n}^n having longest ending contiguous subsequence with the same value of length k; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=29A228273