19158

Appears in sequences

• Number of partitions of n where each part i is marked with a word of length i over a senary alphabet whose letters appear in alphabetical order.at n=5A261740
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 113", based on the 5-celled von Neumann neighborhood.at n=30A270179
• a(n) = ((n+2)/2)*Sum_{k=0..n/2} (Sum_{i=0..n-2*k} (binomial(k+1,n-2*k-i)*binomial(k+i,k))/(k+1)*C(k)), where C(k) is Catalan numbers.at n=12A270724
• Indices of the triangular numbers in A189475.at n=32A358417
• Lesser of 2 successive tetraprimes (k, k+4) sandwiching three consecutive not squarefree numbers.at n=4A367791