31331

Appears in sequences

• Primitive repfigit numbers.at n=15A006576
• Repfigit (REPetitive FIbonacci-like diGIT) numbers (or Keith numbers).at n=17A007629
• T(4n,n), where T is the array in A026120.at n=5A026130
• Threes and ones.at n=1A033176
• Triangle T(n,k) of numbers with e.g.f. exp((exp((1+x)*y)-1)/(1+x)), k=0..n-1.at n=41A059340
• Least Keith number (or repfigit) with n digits, or 0 if there is none.at n=3A072533
• Multiply-Add Recurrence Invariant (MARI) numbers.at n=38A121235
• Keith numbers together with the numbers from 0 through 9.at n=27A130010
• List of primitive words over the alphabet {1,3}.at n=43A213970
• Number of minimum total dominating sets in the n-antiprism graph.at n=50A302652
• Numbers that are the sum of six fourth powers in five or more ways.at n=22A345562
• Numbers that are the sum of six fourth powers in exactly five ways.at n=21A345817
• Numbers that are the sum of seven fourth powers in exactly seven ways.at n=35A345829
• Number of polyforms with n cells on the faces of a pentagonal icositetrahedron up to rotation.at n=11A383808