21003

Appears in sequences

• Number of directed multigraphs with loops on 4 nodes with n arcs.at n=8A050929
• Numbers n such that (n+j) mod (2+j) = 1 for j from 0 to 6 and (n+7) mod 9 <> 1.at n=16A096025
• Convolution of A008619 and A001400.at n=35A139672
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (0, 0, -1), (0, 1, 0), (1, 0, 0), (1, 1, 1)}.at n=7A151156
• Number of 7-element subsets of {1, 2, ..., n} having pairwise coprime elements.at n=22A186983
• Least number x such that x^n has n digits equal to k. Case k=4.at n=24A285451
• Number of non-isomorphic multiset partitions of weight n with no singletons.at n=11A302545
• Numbers equal to the sum of the aliquot parts of the following k numbers, for some k.at n=22A320022
• Number of non-isomorphic aperiodic multiset partitions of weight n with no singletons.at n=11A320812
• Number of integer partitions of n with no part dividing all the others.at n=48A338470
• a(n) is the smallest k such that k!'s prime(n)-smooth part is less than its prime(n+1)-rough part.at n=33A360316
• Terms as well as digits fit the even/even/odd pattern; this is the lexicographically earliest injective sequence with this property.at n=71A375305