1007001

Appears in sequences

• Number of ordered set partitions with a designated element in each block and no block containing less than two elements.at n=9A052848
• Palindromes that are the sum of two shorter palindromes.at n=24A062696
• Palindromes with digit sum 9.at n=15A121476
• Numbers k such that k and k^2 use only the digits 0, 1, 4, 5 and 7.at n=29A136856
• Triangular array read by rows. T(n,k) is the number of functional digraphs on {1,2,...,n} such that no node is at a distance greater than one from a cycle and there are k recurrent elements whose preimage contains only one element, n>=0, 0<=k<=n.at n=45A220222
• a(n) = (10^n)^2 + 7*(10^n) + 1.at n=3A225813
• Square array T(n,k), n>=0, k>=0, read by antidiagonals, where column k is the expansion of e.g.f. 1/(1 - x^k/k! * (exp(x) - 1)).at n=64A355666
• Square array A(n,k), n>=0, k>=0, read by antidiagonals downwards, where column k is the expansion of e.g.f. 1/(1 - x*(exp(x) - 1)^k).at n=64A392817