30452

Appears in sequences

• Step at which card n appears on top of deck for first time in Guy's shuffling problem A035485.at n=42A035490
• These numbers are the record number of steps for the numbers in A057983 to reach the top of the deck in Guy's shuffle (see A035485).at n=8A057984
• Step at which card n appears on top of deck for first time in Guy's shuffling problem A035485.at n=42A060750
• These numbers are the record number of steps for the numbers in A060751 to reach the top of the deck in Guy's shuffle (see A060750).at n=6A060752
• a(n) = sigma_3(n) - sigma_2(n).at n=29A092349
• Numbers k such that 3*10^k + 6*R_k + 1 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=12A102975
• Number of permutations of length n which avoid the patterns 1234, 2431, 4312.at n=15A116765
• Arises in covering a graph by forests and a matching.at n=21A179259
• Number of nX6 arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 nX6 array.at n=2A219712
• T(n,k)=Number of nXk arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 nXk array.at n=30A219714
• Number of 3Xn arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 3Xn array.at n=5A219716
• Total sum of parts of multiplicity 8 in all partitions of n.at n=44A222736
• Partial sums of the Dedekind psi_2(k) function, for 1 <= k <= n.at n=42A321973