22726

Appears in sequences

• Cluster series for bond percolation problem on f.c.c. lattice.at n=4A003205
• 4-white numbers: partition digits of n^4 into blocks of 4 starting at right; sum of these 4-digit numbers equals n.at n=14A037044
• Largest term in periodic part of continued fraction expansion of square root of 1+3^n or 0 if 1+3^n is square.at n=16A077626
• Largest term in periodic part of continued fraction expansion of square root of -1+3^n.at n=16A077627
• Numbers k such that k!!!! - 1 is prime.at n=27A085147
• Let a(n) = the number of permutations (p(1),p(2),p(3)...,p(n)) of (1,2,3,...,n) where, if each (m,p(m)) is plotted on a graph, then the entire set P of the n of these plotted points would be on the perimeter of the convex hull of P.at n=12A156831
• a(n) is the least number such that k = n*a(n) has sum of digits n and ends with the digit string n, or 0 if no such number exists.at n=43A175690
• Number of (n+3) X (n+3) 0..2 matrices with each 4 X 4 subblock idempotent.at n=8A224720
• 6-step Fibonacci sequence starting with (0,1,0,0,0,0).at n=21A251709
• a(1)=1; for n>1, a(n) = least integer greater than a(n-1) such that the sums of the divisors of the pairwise sums of a(1),...,a(n) are all distinct.at n=42A293542
• Expansion of Product_{k>=1} (1 + x^k)^(d(k)-1), where d(k) = number of divisors of k (A000005).at n=41A318844
• Number of compositions (ordered partitions) of n into centered pentagonal numbers (A005891).at n=42A322801