34272

Appears in sequences

• a(n) is the concatenation of n and 8n.at n=33A009470
• E.g.f.: sech(sinh(x)*log(x+1))=1-12/4!*x^4+60/5!*x^5-450/6!*x^6+2940/7!*x^7...at n=9A012518
• a(n) = T(2n,n), array T as in A054144.at n=7A054147
• Number of 3-rowed binary matrices with n ones and no zero columns, up to row and column permutation.at n=33A058053
• Numbers that are the products of distinct substrings (>1) of themselves and do not end in 0.at n=34A059470
• Number of 6-ary Lyndon words of length n with trace 0 and subtrace 4 over Z_6.at n=8A074426
• Number of 6-ary Lyndon words of length n with trace 3 and subtrace 4 over Z_6.at n=8A074444
• Product of the smallest prime divisors of composite numbers between successive primes.at n=60A076976
• a(n) = n*(n+1)^2*(6*n^3-5*n^2+3*n+2)/24.at n=7A101379
• Totally multiplicative sequence with a(p) = 2*(5p-1) = 10p-2 for prime p.at n=41A167333
• Numbers k > 9 with digits different from 0 and 1 such that both the sum of digits and the product of digits divide k.at n=13A172424
• a(n) = n*(n+1)*(5*n+1)/3.at n=27A174814
• Numbers with prime factorization pqr^2s^5.at n=13A190293
• a(n) = (n-3)*(n-2)*(n-1)*n*(n+1)/30.at n=17A210569
• Number of (w,x,y,z) with all terms in {1,...,n} and w<=2x and y>=3z.at n=23A212515
• a(n) = number of ordered triples (w,x,y) such that w,x,y are all in {0,...,n} and the numbers |w-x|, |x-y|, |y-w| are distinct.at n=33A212963
• T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no occupancy greater than 2.at n=29A221200
• Number of 2 X n arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no occupancy greater than 2.at n=6A221201
• Coefficients of mock modular form H_1^(2) of type 2A.at n=30A256058
• Number of triple-crossings of diagonals in the regular 2n-gon.at n=32A260417