60072

Appears in sequences

• a(n) = 3^n + 2^n - 1.at n=10A005056
• Triangle read by rows in which row n contains the smallest nontrivial set of n consecutive numbers divisible by the next n numbers respectively. The next n numbers are numbers from n(n-1)/2 +1 up to n(n+1)/2.at n=11A091793
• a(n) = Sum_{k + l*m <= n} (k + l*m), with 0 <= k,l,m <= n.at n=30A106846
• a(n) = 9^n+4^n-1.at n=5A155620
• Rectangular array T(n,m), read by upward antidiagonals: T(n,m) is the number of difunctional (regular) binary relations between an n-element set and an m-element set.at n=56A265417
• Starts of runs of 4 consecutive positive negabinary-Niven numbers (A331728).at n=16A331824