21511

Appears in sequences

• Coordination sequence for alpha-Mn, Position Mn3.at n=38A009952
• Number of 3 x n binary matrices without unit columns up to row and column permutations.at n=38A057524
• Table with T(n,k) the number of word structures of length n which can be decomposed into k palindromes but not fewer.at n=51A188792
• Numbers with digital product = 10.at n=34A199990
• Composite numbers whose product of digits is 10.at n=29A201057
• Number of nondecreasing sequences of n 1..6 integers with every element dividing the sequence sum.at n=35A212534
• Total sum of parts of multiplicity 7 in all partitions of n.at n=41A222735
• Numbers k such that k + (sum of digits of k) and k + (product of digits of k) contain the same distinct digits of k.at n=17A248718
• Expansion of Product_{k>=1} (1 + x^k)^(k*(2*k^2+1)/3).at n=9A281157
• Expansion of Product_{k>=1} ((1 + x^(4*k)) / (1 - x^k))^k.at n=17A285460
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-2) + 2n, where a(0) = 1, a(1) = 2, b(0) = 3.at n=16A294538
• Numbers k whose binary expansion contains 2 adjacent 1's and A391571(k) = k.at n=42A391581