22254

Appears in sequences

• Apply partial sum operator thrice to primes.at n=19A014150
• a(n) is the sum over all floor(k^3/n), k=0 to n inclusive.at n=43A014818
• Numbers which are the sum of their proper divisors containing the digit 7.at n=29A059466
• Triangle of numbers of walks in the quarter-plane, of length 2n beginning and ending at the origin using steps {(1,1), (1,0), (-1,0), (-1,-1)} (Gessel steps) arranged according to the number of times the steps (1,1) and (-1,-1) occur.at n=25A157513
• Sum of the heights of the first peaks in all dispersed Dyck paths of length n (i.e., in Motzkin paths of length n with no (1,0)-steps at positive heights).at n=16A191307
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 331", based on the 5-celled von Neumann neighborhood.at n=31A271279
• a(n) = n*(1-3n+2*n^2+2*n^3)/2.at n=12A277977
• Compound filter (summands of A004001 & summands of A005185): a(n) = P(A286541(n), A286559(n)), where P(n,k) is sequence A000027 used as a pairing function, with a(1) = a(2) = 0.at n=26A286560