18162

Appears in sequences

• Distinct perimeter lengths of polygons with regularly spaced vertices.at n=14A007874
• a(n) is the concatenation of n and 9n.at n=17A009474
• a(n) = (d(n)-r(n))/2, where d = A026049 and r is the periodic sequence with fundamental period (1,0,0,1).at n=43A026050
• Number of partitions of n into parts not of the form 21k, 21k+4 or 21k-4. Also number of partitions with at most 3 parts of size 1 and differences between parts at distance 9 are greater than 1.at n=39A035982
• Number of partitions satisfying cn(0,5) + cn(2,5) < cn(1,5) + cn(4,5) and cn(0,5) + cn(3,5) < cn(1,5) + cn(4,5).at n=38A039885
• a(n) = 3*n^3 + 2*n^2 + n.at n=18A067389
• Numbers k such that Sum_{i=1..k} i^6 divides Product_{i=1..k} i^6.at n=15A166606
• Number of ordered triples (w,x,y) with all terms in {1,...,n} and w^2<=x^2+y^2.at n=29A211634
• Total number of parts of multiplicity 6 in all partitions of n.at n=42A222706
• First differences of A263276; length of n-th run of terms of same parity in A259934.at n=4A263277
• a(n) = length of n-th run of even terms in A259934.at n=2A263278
• Numbers n such that 7*8^n + 1 is prime.at n=8A269544
• Number of set partitions of [n] such that for each block all absolute differences between consecutive elements are <= six.at n=9A287278
• Number of weakly unimodal compositions of n in which the greatest part occurs exactly four times.at n=40A320315
• Number of integer partitions of n with an alternating permutation.at n=38A345170