47320
domain: N
Appears in sequences
- Robbins triangle read by rows: T(n,k) = number of alternating sign n X n matrices with a 1 at top of column k (n >= 1, 1<=k<=n).at n=23A048601
- Robbins triangle read by rows: T(n,k) = number of alternating sign n X n matrices with a 1 at top of column k (n >= 1, 1<=k<=n).at n=25A048601
- a(n) = (9*n + 11)*binomial(n+10, 10)/11.at n=6A056128
- Sum of the squares of the a(n)-th and the (a(n)+1)st triangular numbers (A000217) is a perfect square.at n=5A065113
- Expansion of e.g.f. cosh(sqrt(2)*x) + exp(x)*(cosh(sqrt(2)*x) - 1).at n=13A088015
- Expansion of (1+4*x+x^2)/((1-x^2)*(1-2*x-x^2)); a Pellian-related sequence.at n=11A114696
- Sequence A001333 with last digits set to zero.at n=13A131037
- Sum of tetrahedral numbers A000292(k), with k in the reduced residue system modulo n.at n=39A189918
- Number of (n+2) X 4 binary arrays avoiding patterns 001 and 101 in rows and columns.at n=10A202196
- Number of nX7 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 0 vertically.at n=3A207660
- T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 0 vertically.at n=48A207661
- Number of 4Xn 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 0 vertically.at n=6A207662
- T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 0 and 1 1 1 vertically.at n=51A207895
- Number of 7Xn 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 0 and 1 1 1 vertically.at n=3A207900
- Number of dominating subsets with k vertices in all the graphs G(n) (n>=1) obtained by taking n copies of the path P_3 and identifying one of their endpoints (a star with n branches of length 2).at n=11A213667
- Row sums of triangle in A152719.at n=23A238375
- a(n) = A000984(n) * A081085(n).at n=4A239226
- Coordination sequence for (2,3,9) tiling of hyperbolic plane.at n=40A265059
- Expansion of (x^4+x^3-x^2+x)/(x^3+x^2-3*x+1).at n=13A265278
- Number of pairs (p,q) of partitions of n into distinct parts such that p majorizes q in the dominance order.at n=31A265506