493920

Appears in sequences

• a(0) = a(1) = 1; thereafter a(n) = sigma(a(n-1)) + sigma(a(n-2)).at n=15A000458
• Triangle whose (i,j)-th entry is binomial(i,j)*7^(i-j)*12^j.at n=17A038278
• Triangle whose (i,j)-th entry is binomial(i,j)*12^(i-j)*7^j.at n=18A038333
• There exists some k>0 such that n is the product of (k + digits of n).at n=25A055482
• Numbers n such that n=(d_1+5)(d_2+5)*...*(d_k+5), where d_1 d_2 ... d_k is the decimal expansion of n.at n=9A097371
• Partition number array, called M31(6), related to A049374(n,m)= |S1(6;n,m)| (generalized Stirling triangle).at n=32A144356
• Triangle T(n, k) = A090443(n-1)/(A090443(k-1)*A090443(n-k-1)) read by rows.at n=40A173882
• Triangle a(n,k) = binomial(n,k)*binomial(n+1,k+1)*binomial(n+2,k+2) read by rows.at n=38A187552
• Triangle T(n,k) of strongly graded (3+1)-free partially ordered sets (posets) on n labeled vertices with height k.at n=33A222864
• Number of n X 4 arrays of permutations of 4 copies of 0..n-1 with row sums equal and column sums equal.at n=4A265088
• T(n,k)=Number of nXk arrays containing k copies of 0..n-1 with row sums equal and column sums equal.at n=32A265089
• Number of 5Xn arrays containing n copies of 0..5-1 with row sums equal and column sums equal.at n=3A265091
• Triangle read by rows where T(n,k), n>=1, 1<=k<=n is the number of (0,1)-matrices of size n with the first row and column sum = k and remaining sums = 1.at n=39A308498
• Triangle read by rows: T(n,k) is the number of oriented colorings of the edges of a regular n-dimensional simplex using exactly k colors. Row n has (n+1)*n/2 columns.at n=16A327087
• Triangle read by rows: T(n,k) is the number of oriented colorings of the faces (and peaks) of a regular n-dimensional simplex using exactly k colors. Row n has C(n+1,3) columns.at n=11A338113
• Triangle read by rows: T(n,k) is the number of labeled tiered posets with n elements and height k.at n=42A361956
• Triangular array read by rows. T(n,k) is the number of Green's H-classes of rank k in the semigroup of partial transformations, n >= 0, 0 <= k <= n.at n=51A363849
• a(n) = (1/5) A374658(n).at n=6A374659
• Triangle read by rows: T(n, k) = Lah(n, k)*CatalanNumber(k), and Lah = A271703.at n=41A390725