20229

Appears in sequences

• Number of unlabeled graphs with n equal to the number of vertices plus the number of edges.at n=20A120412
• a(n) = 70*n^2 - 1.at n=16A158736
• Row sums of triangle A175009.at n=26A175006
• Number of n X 3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,3,2,1,2 for x=0,1,2,3,4.at n=9A197337
• Numbers of the form HMMSS with primes H < 24 and MM, SS < 60, for which the number of seconds after midnight, 3600*H+60*MM+SS, is also prime.at n=2A295011
• Prime time numbers on 6-digit clocks: numbers of the form HMMSS where H, MM, SS are primes, H < 24, MM and SS < 60.at n=9A295014
• Number of partitions of n in which the sequence of the sum of the same summands is nondecreasing.at n=49A304405
• Sum of the third largest parts of the partitions of n into 5 parts.at n=50A308825
• Floor of area of triangle whose sides are consecutive Ulam numbers (A002858).at n=42A330909
• Numbers k such that w(k-2), w(k-1), and w(k) are all odd, where w is A336957.at n=7A338070
• Irregular table: n-th row polynomial given by the formal power series expansion of Sum_{k >= 0} (1 + q)^(n*k + k*(k+1)/2)* Product_{j = 1..k} (1 - (1 + q)^j), n >= 1.at n=31A340880
• a(n) is the row of the Trithoff (tribonacci) array that contains the tails of the sequence which is n times the tribonacci numbers.at n=25A351685